Reidar Fossmark
Publications
2025
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                            Dubois, Leonard; 
                        
                    
                        
                            Seksik, Philippe; 
                        
                    
                        
                            Nancey, Stephane; 
                        
                    
                        
                            Nachury, Maria; 
                        
                    
                        
                            Treton, Xavier; 
                        
                    
                        
                            Buisson, Anthony.
                        
                    
                
                
                    (2025)
                
                
                    
                        
                        
                            
                                
                                     UNCOVERING THE DYNAMICS OF MUCOSA-ASSOCIATED MICROBIOTAIN POST-OPERATIVE RECURRENCE OF CROHN’S DISEASE.
                                
                                
                            
                        
                    
                
                
                    
                    
                        United European Gastroenterology Journal (UEG Journal)
                    
                
                
                
                    Abstract
2024
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                            Fossmark, Reidar; 
                        
                    
                        
                            Olaisen, Maya.
                        
                    
                
                
                    (2024)
                
                
                    
                        
                        
                            
                                
                                     Changes in the Gastrointestinal Microbiota Induced by Proton Pump Inhibitors—A Review of Findings from Experimental Trials.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Microorganisms
                    
                
                
                
                    Academic literature review
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                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2024)
                
                
                    
                        
                        
                            
                                
                                     Eradication of Helicobacter pylori by a potassium-competitive acid blocker alone?.
                                
                                
                            
                        
                    
                
                
                
                
                    Feature article
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                            Straum, Synne; 
                        
                    
                        
                            Bringaker, Karoline Wollan; 
                        
                    
                        
                            Rekstad, Lars Cato; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2024)
                
                
                    
                        
                        
                            
                                
                                     Esophageal cancers missed at upper endoscopy in Central Norway 2004 to 2021 – A population-based study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        BMC Gastroenterology
                    
                
                
                
                    Academic article
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                            Kvamme, Camilla Jørdre; 
                        
                    
                        
                            Stillingen, Thomas Lindmo; 
                        
                    
                        
                            Sandø-Klemmetvoll, Alina Desiree; 
                        
                    
                        
                            Mjønes, Patricia Gjertrud; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2024)
                
                
                    
                        
                        
                            
                                
                                     Early Gastric Cancers in Central Norway 2001 to 2016—A Population-Based Study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Cancers
                    
                
                
                
                    Academic article
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                            Bringeland, Erling Audun; 
                        
                    
                        
                            Våge, Christina; 
                        
                    
                        
                            Ubøe, Ann Amelia Savage; 
                        
                    
                        
                            Sandø, Alina Desiree; 
                        
                    
                        
                            Mjønes, Patricia Gjertrud; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2024)
                
                
                    
                        
                        
                            
                                
                                     Epstein–Barr Virus and Clinico-Endoscopic Characteristics of Gastric Remnant Cancers Compared to Proximal Non-Remnant Cancers: A Population-Based Study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Cancers
                    
                
                
                
                    Academic article
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                            Berg, Sigrid; 
                        
                    
                        
                            Amini, Naseh; 
                        
                    
                        
                            Solberg, Stian; 
                        
                    
                        
                            Ødegård, Rønnaug Astri; 
                        
                    
                        
                            Kulseng, Bård Eirik; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2024)
                
                
                    
                        
                        
                            
                                
                                     Ex Vivo Demonstration of a Novel Dual-Frequency Ultrasound Method for Quantitative Measurements of Liver Fat Content.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Ultrasound in Medicine and Biology
                    
                
                
                
                    Academic article
2023
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                            Fossmark, Reidar.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Helseplattformen må lukkes.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Adresseavisen
                    
                
                
                
                    Reader opinion piece
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                            Fossmark, Reidar; 
                        
                    
                        
                            Lirhus, Sandre Svatun; 
                        
                    
                        
                            Høivik, Marte Lie.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     The impact of proton pump inhibitors on the course of ulcerative colitis: a cohort study of over 10,000 newly diagnosed patients in Norway.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Inflammation and Digestive Cancer.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Molecular Sciences
                    
                
                
                
                    Academic literature review
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                            Fossmark, Reidar; 
                        
                    
                        
                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Sørdal, Øystein Finset.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Is empiric proton pump inhibition in patients with symptoms of extraesophageal gastroesophageal reflux justified?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        BMC Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Fasting, Magnus Hølmo.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Dysplasi og tidlig kreft i øsofagus.
                                
                                
                            
                        
                    
                
                
                    
                    
                        NGF-nytt
                    
                
                
                
                    Article in business/trade/industry journal
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                            Fossmark, Reidar; 
                        
                    
                        
                            Dalsbø, Peter Lefstad; 
                        
                    
                        
                            Rokseth, Kjell Morten; 
                        
                    
                        
                            Hauso, Øyvind.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Laser lithotripsy for the treatment of a giant fecalith obstructing a colorectal anastomosis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Endoscopy
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Folkestad, Oddry H; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Mjønes, Patricia Gjertrud; 
                        
                    
                        
                            Fougner, Reidun; 
                        
                    
                        
                            Wasmuth, Hans; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Survival Trends in Patients with Small Intestinal Neuroendocrine Tumours—A Cohort Study in Central Norway.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Cancers
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Ubøe, Ann Amelia Savage; 
                        
                    
                        
                            Våge, Christina; 
                        
                    
                        
                            Mjønes, Patricia Gjertrud; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Gastric remnant cancer and long-term survival in Central Norway 2001 to 2016 – A population-based study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Surgial oncology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Hauge, Tobias.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Surveillance ved Barretts øsofagus.
                                
                                
                            
                        
                    
                
                
                    
                    
                        NGF-nytt
                    
                
                
                
                    Academic literature review
2022
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                            Olaisen, Maya; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     Reply to "Too Soon to Dismiss Inflammation-Related Differences in the Mucosa-Associated Microbiota in Crohn's Disease Patients".
                                
                                
                            
                        
                    
                
                
                    
                    
                        Inflammatory Bowel Diseases
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     Proton pump inhibitors and mortality.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Richard, Mathias L.; 
                        
                    
                        
                            Beisvag, Vidar; 
                        
                    
                        
                            Granlund, Atle van Beelen; 
                        
                    
                        
                            Røyset, Elin Synnøve; 
                        
                    
                        
                            Rué, Olivier.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     The ileal fungal microbiota is altered in Crohn's disease and is associated with the disease course.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Frontiers in Medicine
                    
                
                
                
                    Academic article
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                            Beck, Marianne; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     Ventrikkelcancer oversett ved gastroskopi i Midt-Norge 2007-2016 – En populasjonsbasert studie.
                                
                                
                            
                        
                    
                
                
                    
                    
                        NGF-nytt
                    
                
                
                
                    Article in business/trade/industry journal
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                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Lagergren, Jesper; 
                        
                    
                        
                            Grønbech, Jon Erik; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     Hypergastrinemia and mortality in gastric adenocarcinoma: a population-based cohort study, the HUNT study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
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                            Fossmark, Reidar; 
                        
                    
                        
                            Johannessen, Rune; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Mjønes, Patricia.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     Do Gastric Signet Ring Cell Carcinomas and ECL-Cell Neuroendocrine Tumours Have a Common Origin?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Medicina
                    
                
                
                
                    Academic article
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                            Ausen, Kjersti; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Spigset, Olav; 
                        
                    
                        
                            Pleym, Hilde.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     Safety and Efficacy of Local Tranexamic Acid for the Prevention of Surgical Bleeding in Soft-Tissue Surgery: A Review of the Literature and Recommendations for Plastic Surgery.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Plastic and Reconstructive Surgery
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Sandvik, Elfrid Christine Smith; 
                        
                    
                        
                            Aasarød, Kristin Matre; 
                        
                    
                        
                            Johnsen, Gjermund; 
                        
                    
                        
                            Hoff, Dag Arne Lihaug; 
                        
                    
                        
                            Kulseng, Bård Eirik; 
                        
                    
                        
                            Hyldmo, Åsne Ask.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     The Effect of Roux-en-Y Gastric Bypass on Non-Alcoholic Fatty Liver Disease Fibrosis Assessed by FIB-4 and NFS Scores—An 11.6-Year Follow-Up Study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Clinical Medicine
                    
                
                
                
                    Academic article
2021
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                            Aasarød, Kristin Matre; 
                        
                    
                        
                            Mosti, Mats Peder; 
                        
                    
                        
                            Teie, Malin Isabell; 
                        
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Syversen, Unni.
                        
                    
                
                
                    (2021)
                
                
                    
                        
                        
                            
                                
                                     Do patients with gastroesophageal reflux disease exhibit compromised bone quality prior to proton pump inhibitor therapy?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Bone Reports
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Lagergren, Jesper; 
                        
                    
                        
                            Grønbech, Jon Erik; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2021)
                
                
                    
                        
                        
                            
                                
                                     HYPERGASTRINEMIA IS NOT ASSOCIATED WITH INCREASED MORTALITY IN GASTRIC ADENOCARCINOMA.
                                
                                
                            
                        
                    
                
                
                    
                    
                        United European Gastroenterology Journal (UEG Journal)
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Folkestad, Oddry; 
                        
                    
                        
                            Wasmuth, Hans; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Fougner, Reidun; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2021)
                
                
                    
                        
                        
                            
                                
                                     Survival and disease recurrence in patients with duodenal neuroendocrine tumours—a single centre cohort.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Cancers
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2021)
                
                
                    
                        
                        
                            
                                
                                     Gastritis, Gastric Polyps and Gastric Cancer.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Molecular Sciences
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Beck, Marianne; 
                        
                    
                        
                            Bringeland, Erling A.; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2021)
                
                
                    
                        
                        
                            
                                
                                     Gastric cancers missed at upper endoscopy in central norway 2007 to 2016—a population-based study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Cancers
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Melberg, Hans Olav.
                        
                    
                
                
                    (2021)
                
                
                    
                        
                        
                            
                                
                                     Factors associated with the persistence of oral 5-aminosalicylic acid monotherapy in ulcerative colitis: a nationwide Norwegian cohort study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Therapeutic Advances in Gastroenterology
                    
                
                
                
                    Academic article
2020
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                            Olaisen, Maya; 
                        
                    
                        
                            Flatberg, Arnar; 
                        
                    
                        
                            Granlund, Atle van Beelen; 
                        
                    
                        
                            Røyset, Elin Synnøve; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Sandvik, Arne Kristian.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     Bacterial Mucosa-associated Microbiome in Inflamed and Proximal Noninflamed Ileum of Patients With Crohn's Disease.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Inflammatory Bowel Diseases
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Folkestad, Oddry H; 
                        
                    
                        
                            Wasmuth, Hans; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Fougner, Reidun; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     Survival and disease recurrence in patients operated for small intestinal neuroendocrine tumors at a referral hospital.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Surgial oncology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Mattsson, Fredrik; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Lagergren, Jesper; 
                        
                    
                        
                            Grønbech, Jon Erik.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     Hypergastrinemia is associated with an increased risk of gastric adenocarcinoma with proximal location: A prospective population-based nested case-control study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Cancer
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Mattsson, Fredrik; 
                        
                    
                        
                            Lagergren, Jesper; 
                        
                    
                        
                            Grønbech, Jon Erik; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     Hypergastrinemia is associated with proximal and intestinal type gastric adenocarcinoma.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Aasarød, Kristin Matre; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Flatberg, Arnar; 
                        
                    
                        
                            Mjønes, Patricia.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     Gastric Corpus Mucosal Hyperplasia and
Neuroendocrine Cell Hyperplasia, but not
Spasmolytic Polypeptide-Expressing Metaplasia,
Is Prevented by a Gastrin Receptor Antagonist in
H+/K+ATPase Beta Subunit Knockout Mice.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Molecular Sciences
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Flatberg, Arnar; 
                        
                    
                        
                            Granlund, Atle van Beelen; 
                        
                    
                        
                            Røyset, Elin Synnøve; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Sandvik, Arne Kristian.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     P833 Bacterial mucosa-associated microbiome in inflamed and proximal non-inflamed ileum of patients with Crohn’s disease.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Crohn's and Colitis
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Melberg, Hans Olav.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     P760 Differences in persistence of oral mesalazine preparations as monotherapy in patients with ulcerative colitis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Crohn's and Colitis
                    
                
                
                
                    Abstract
2019
- 
                
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Spigset, Olav; 
                        
                    
                        
                            Flatberg, Arnar; 
                        
                    
                        
                            Granlund, Atle van Beelen; 
                        
                    
                        
                            Brede, wenche Rødseth; 
                        
                    
                        
                            Albrektsen, Grethe.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     Mucosal 5-aminosalicylic acid concentration, drug formulation and mucosal microbiome in patients with quiescent ulcerative colitis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     The phylogeny and biological function of gastric juice-microbiological consequences of removing gastric acid.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Molecular Sciences
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     Editorial: mesalamine and mucosal microbiome in quiescent ulcerative colitis – what can we learn? Authors reply.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     Role of Autoimmune Gastritis in Gastric Cancer.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Clinical and Translational Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Balto, Tine Marie; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Grønbech, Jon Erik; 
                        
                    
                        
                            Munkvold, Bjørn; 
                        
                    
                        
                            Mjønes, Patricia.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     Hepatic micrometastases outside macrometastases are present in all patients with ileal neuroendocrine primary tumour at the time of liver resection.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     Enterochromaffin-like (ECL) Cells.
                                
                                
                            
                        
                    
                
                
                
                
                    Chapter
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     Adverse effects of proton pump inhibitors – evidence and plausibility.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Molecular Sciences
                    
                
                
                
                    Academic literature review
2018
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2018)
                
                
                    
                        
                        
                            
                                
                                     Proton pump inhibitors (PPIs) may cause gastric cancer – clinical consequences.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2018)
                
                
                    
                        
                        
                            
                                
                                     Types of gastric carcinomas.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Molecular Sciences
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Öberg, Kjell; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Gustafsson, Björn; 
                        
                    
                        
                            Mjønes, Patricia.
                        
                    
                
                
                    (2018)
                
                
                    
                        
                        
                            
                                
                                     Not only stem cells, but also mature cells, particularly neuroendocrine cells, may develop into tumours: time for a paradigm shift.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Therapeutic Advances in Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2018)
                
                
                    
                        
                        
                            
                                
                                     Proton pump inhibitors and gastric cancer: a long expected side effect finally reported also in man.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gut
                    
                
                
                
                    Academic article
2017
- 
                
                    
                        
                            Vange, Pål; 
                        
                    
                        
                            Bruland, Torunn; 
                        
                    
                        
                            Doseth, Berit; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sousa, Mirta; 
                        
                    
                        
                            Beisvag, Vidar.
                        
                    
                
                
                    (2017)
                
                
                    
                        
                        
                            
                                
                                     The cytoprotective protein clusterin is overexpressed in hypergastrinemic rodent models of oxyntic preneoplasia and promotes gastric cancer cell survival.
                                
                                
                            
                        
                    
                
                
                    
                    
                        PLOS ONE
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sandvik, Arne Kristian.
                        
                    
                
                
                    (2017)
                
                
                    
                        
                        
                            
                                
                                     Expression of the cholecystokinin-B receptor in neoplastic gastric cells.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Hormones and Cancer
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2017)
                
                
                    
                        
                        
                            
                                
                                     Sykdommer i ventrikkel og duodenum.
                                
                                
                            
                        
                    
                
                
                
                
                    Chapter
2016
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Brenna, Eiliv; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Does long-term profound inhibition of gastric acid secretion increase the risk of ECL cell-derived tumors in man?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Boyce, Malcolm; 
                        
                    
                        
                            Moore, Andrew; 
                        
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Parsons, Bryony; 
                        
                    
                        
                            Varro, Andrea; 
                        
                    
                        
                            Campbell, Fiona.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Netazepide, a gastrin/cholecystokinin-2 receptor antagonist, can eradicate gastric neuroendocrine tumours in patients with autoimmune chronic atrophic gastritis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        British Journal of Clinical Pharmacology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Mjønes, Patricia Gjertrud; 
                        
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Boyce, Malcolm; 
                        
                    
                        
                            Waldum, Helge Lyder; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     The gastrin receptor antagonist netazepide (YF476) in patients with type 1 gastric enterochromaffin-like cell neuroendocrine tumours: Review of long-term treatment.
                                
                                
                            
                        
                    
                
                
                    
                    
                        European Journal of Gastroenterology and Hepathology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Mjønes, Patricia.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Follow-up of patients with ECL cell-derived tumours.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Adverse Effects of Proton Pump Inhibitors in Chronic Kidney Disease.
                                
                                
                            
                        
                    
                
                
                    
                    
                        JAMA Internal Medicine
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     To the editor.
                                
                                
                            
                        
                    
                
                
                    
                    
                        JAMA Internal Medicine
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Aasarød, Kristin Matre; 
                        
                    
                        
                            Ramezanzadehkoldeh, Masoud; 
                        
                    
                        
                            Shabestari, Maziar; 
                        
                    
                        
                            Mosti, Mats Peder; 
                        
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Reseland, Janne Elin.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Skeletal effects of a gastrin receptor antagonist in H+/K+ATPase beta subunit KO mice.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Endocrinology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Rao, Shalini; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Munkvold, Bjørn; 
                        
                    
                        
                            Flatberg, Arnar; 
                        
                    
                        
                            Varro, Andrea.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     PAI-1 deficiency increases the trophic effects of hypergastrinemia in the gastric corpus mucosa.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Peptides
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Calvete, Oriol; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Benitez, Javier; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     ECL-cell carcinoids and carcinoma in patients homozygous for an inactivating mutation in the gastric H<sup>+</sup>K<sup>+</sup>ATPase alpha subunit.
                                
                                
                            
                        
                    
                
                
                    
                    
                        APMIS - Journal of Pathologiy, Microbiology and Immunology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Aasarød, Kristin Matre; 
                        
                    
                        
                            Mosti, Mats Peder; 
                        
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Reseland, Janne Elin; 
                        
                    
                        
                            Basso, Trude; 
                        
                    
                        
                            Syversen, Unni.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Impaired skeletal health in patients with chronic atrophic gastritis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Aasarød, Kristin Matre; 
                        
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Mosti, Mats Peder; 
                        
                    
                        
                            Ramezanzadehkoldeh, Masoud; 
                        
                    
                        
                            Viggaklev, Bjørn Ivar; 
                        
                    
                        
                            Reseland, Janne Elin.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Effects of the histamine 1 receptor antagonist cetirizine on the osteoporotic phenotype in H+ /K+ ATPase beta subunit KO mice.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Cellular Biochemistry
                    
                
                
                
                    Academic article
2015
- 
                
                    
                        
                            Olsen, Paul Anders S.; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar.
                        
                    
                
                
                    (2015)
                
                
                    
                        
                        
                            
                                
                                     Fecal calprotectin in patients with suspected small bowel disease – a selection tool for small bowel capsule endoscopy?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Ausen, Kjersti; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Spigset, Olav; 
                        
                    
                        
                            Pleym, Hilde.
                        
                    
                
                
                    (2015)
                
                
                    
                        
                        
                            
                                
                                     Randomized clinical trial of topical tranexamic acid after reduction mammoplasty.
                                
                                
                            
                        
                    
                
                
                    
                    
                        British Journal of Surgery
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2015)
                
                
                    
                        
                        
                            
                                
                                     Hypergastrinemia is associated with adenocarcinomas in the gastric corpus and shorter patient survival.
                                
                                
                            
                        
                    
                
                
                    
                    
                        APMIS - Journal of Pathologiy, Microbiology and Immunology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2015)
                
                
                    
                        
                        
                            
                                
                                     Letter: Proton pump inhibitors, hypergastrinaemia and the risk of gastric neoplasia.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Kleveland, Per Martin; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2015)
                
                
                    
                        
                        
                            
                                
                                     Upper gastrointestinal physiology and diseases.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
2014
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     Serum gastrin in relation to localization and histological sub-classification of non-cardia adenocarcinomas in the stomach.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Mårvik, Ronald; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     The gastric mucosa 25 years after proxiaml gastric vagotomy.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     Gastrin May Mediate the Carcinogenic Effect of Helicobacter pylori Infection of the Stomach.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Digestive Diseases and Sciences
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Walenkamp, A; 
                        
                    
                        
                            Crespo, G; 
                        
                    
                        
                            Maya, F Fierro; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Igaz, P; 
                        
                    
                        
                            Rinke, A.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     Hallmarks of gastrointestinal neuroendocrine tumours: Implications for treatment.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Endocrine-Related Cancer
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Olsen, Paul A S; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     Fecal calprotectin in patients with suspected small bowel disease - A selection tool for small bowel capsule endoscopy?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     The regulation of gastric acid secretion - clinical perspectives.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Acta Physiologica
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Rydning, Astrid; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Mjønes, Patricia Gjertrud; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     Cytomegalovirus infection and postoperative complications in patients with ulcerative colitis undergoing colectomy.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
2013
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     The effects of unilateral truncal vagotomy on gastric carcinogenesis in hypergastrinemic Japanese female cotton rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Regulatory Peptides
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Zeinali, Fatemeh; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Wiseth, Rune; 
                        
                    
                        
                            Hjertner, Øyvind; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Serotonin in blood: Assessment of its origin by concomitant determination of beta-thromboglobulin (platelets) and chromogranin A (enterochromaffin cells).
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Clinical and Laboratory Investigation
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Skarsvåg, Espen Christoffer; 
                        
                    
                        
                            Aarset, Harald; 
                        
                    
                        
                            Hjort-Hansen, Henrik; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Symptomatic primary (Al) amyloidosis of the stomach and duodenum.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Case Reports in Gastrointestinal Medicine
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Zwiggelaar, Rosalie Theda Margien; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Kidd, Mark; 
                        
                    
                        
                            Furnes, Marianne Waldum; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Tu1089 Somatostatin and the Slow-Growing Nature of Small Intestinal Neuroendocrine Tumors.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Vigen, Alexander; 
                        
                    
                        
                            Kodama, Yosuke; 
                        
                    
                        
                            Viset, Trond; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Kidd, Mark.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Immunohistochemical evidence for an impairment of autophagy in tumorigenesis of gastric carcinoids and adenocarcinomas in rodent models and patients.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Histology and Histopathology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Bretthauer, Michael; 
                        
                    
                        
                            Gustafsson, Björn.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Who should perform endoscopies? (Hvem bør utføre endoskopier?).
                                
                                
                            
                        
                    
                
                
                    
                    
                        Tidsskrift for Den norske legeforening (Tidsskriftet)
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Suren, Pål; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Karakterer på medisinstudiet bør gjeninnføres.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Dagens medisin
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Development of diffuse carcinomas in the gastric corpus in patients with rugal hyperplastic gastritis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Cancer
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Skarsvåg, Espen Christoffer; 
                        
                    
                        
                            Hjort-Hansen, Henrik; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Symptomatic primary (AL) amyloidosis in the stomach and duodenum.
                                
                                
                            
                        
                    
                
                
                    
                    
                        BestPractice Gastroenterologi
                    
                
                
                
                    Article in business/trade/industry journal
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     The Distressing Overuse of Gastric Acid Inhibitors.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Digestive Diseases and Sciences
                    
                
                
                
                    Editorial
2012
- 
                
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Long-term use of proton pump inhibitors – consequences for the gastric mucosa.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Best Practice Onkologi/Hematologi
                    
                
                
                
                    Article in business/trade/industry journal
- 
                
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Gastric Carcinomas Localized to the Cardia.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology Research and Practice
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Lange, Ove Juel; 
                        
                    
                        
                            Viset, Trond; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Fougner, Reidun Lyngvi.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Gastric neuroendocrine carcinoma after long-term use of proton pump inhibitor.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Boyce, M.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Treatment of gastric carcinoids type 1 with the gastrin receptor antagonist netazepide (YF476) results in regression of tumours and normalisation of serum chromogranin A.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sørdal, O.J.; 
                        
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Boyce, M; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     YF476, a Gastrin Receptor Antagonist, Causes Regression of Tumors and Normalizes Serum Chromogranin A in Patients with Type 1 Gastric Carcinoids.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Neuroendocrinology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Riis, Åse Garløv; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Clinical experience with infliximab and adalimumab in a single-center cohort of patients with Crohn's disease.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Erlandsen, Sten Even; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Bakke, Ingunn; 
                        
                    
                        
                            Chen, Duan; 
                        
                    
                        
                            Sandvik, Arne Kristian.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Regulated endocrine-specific protein 18 (RESP18) is localized to and regulated in A-like cells and G-cells in rat stomach.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Regulatory Peptides
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Vigen, Alexander; 
                        
                    
                        
                            Kodama, Yosuke; 
                        
                    
                        
                            Viset, Trond; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Kidd, Mark.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Impaired Autophagy in Gastric Carcinoids and Adenocarcinoma of Both Rodent Models and Patients.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Withdrawing PPI Therapy: Response to Metz et al.
                                
                                
                            
                        
                    
                
                
                    
                    
                        American Journal of Gastroenterology
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Petzold, Christiane; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Rubert, Marina; 
                        
                    
                        
                            Lian, Aina-Mari.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Decreased bone mineral density and reduced bone quality in H+/K+ ATPase beta-subunit deficient mice.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Cellular Biochemistry
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Viset, Trond; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Mårvik, Ronald.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Gastric carcinoids after long-term use of a proton pump inhibitor.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Academic article
2011
- 
                
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Westbroek, Irene; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Berge, Rolf Kristian; 
                        
                    
                        
                            Reseland, Janne Elin; 
                        
                    
                        
                            Syversen, Unni.
                        
                    
                
                
                    (2011)
                
                
                    
                        
                        
                            
                                
                                     Skeletal effects of the saturated 3-thia fatty acid tetradecylthioacetic acid in rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        PPAR Research
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Westbroek, Irene; 
                        
                    
                        
                            Gustafsson, Björn; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waarsing, Jan H; 
                        
                    
                        
                            Eriksen, Erik Fink.
                        
                    
                
                
                    (2011)
                
                
                    
                        
                        
                            
                                
                                     The peroxisome proliferator-activated receptor (PPAR) alpha agonist fenofibrate maintains bone mass, while the PPAR gamma agonist pioglitazone exaggerates bone loss, in ovariectomized rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        BMC Endocrine Disorders
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Syversen, Unni; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Fykse, Vidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2011)
                
                
                    
                        
                        
                            
                                
                                     Five-year follow-up of patients treated for 1 year with octreotide long-acting release for enterochromaffin-like cell carcinoids.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2011)
                
                
                    
                        
                        
                            
                                
                                     Animal models to study the role of long-term hypergastrinemia in gastric carcinogenesis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Biomedicine and Biotechnology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Gustafsson, Björn; 
                        
                    
                        
                            Bakke, Ingunn; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Kidd, Mark; 
                        
                    
                        
                            Modlin, Irvin M; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2011)
                
                
                    
                        
                        
                            
                                
                                     Parietal cell activation by arborization of ECL cell cytoplasmic projections is likely the mechanism for histamine induced secretion of hydrochloric acid.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
2010
- 
                
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2010)
                
                
                    
                        
                        
                            
                                
                                     Long-term gastric changes in achlorhydric H+/K+-ATPase beta subunit deficient mice.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Syversen, Unni; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2010)
                
                
                    
                        
                        
                            
                                
                                     A meal test improves the specificity of chromogranin A as a marker of neuroendocrine neoplasia.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Tumour Biology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Kleveland, Per Martin; 
                        
                    
                        
                            Sandvik, Arne Kristian.
                        
                    
                
                
                    (2010)
                
                
                    
                        
                        
                            
                                
                                     Rebound acid hypersecretion from a physiological, pathophysiological and clinical viewpoint.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Skogaker, Nan E Tostrup; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Bendheim, Marianne Østensen.
                        
                    
                
                
                    (2010)
                
                
                    
                        
                        
                            
                                
                                     Neuroendocrine Cells in Diffuse Gastric Carcinomas: An Ultrastructural Study With Immunogold Labeling of Chromogranin A.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Applied immunohistochemistry & molecular morphology (Print)
                    
                
                
                
                    Academic article
2009
- 
                
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Fossmark, R; 
                        
                    
                        
                            Syversen, U; 
                        
                    
                        
                            Hauso, O; 
                        
                    
                        
                            Waldum, H.
                        
                    
                
                
                    (2009)
                
                
                    
                        
                        
                            
                                
                                     A Meal-Test Improves the Specificity of Chromogranin A as a Marker of Neuroendocrine Neoplasia.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Neuroendocrinology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2009)
                
                
                    
                        
                        
                            
                                
                                     Effect of antrectomy in hypergastrinaemic female Japanese cotton rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Kleveland, Per Martin; 
                        
                    
                        
                            Brenna, Eiliv; 
                        
                    
                        
                            Bakke, Ingunn; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Martinsen, Tom Christian.
                        
                    
                
                
                    (2009)
                
                
                    
                        
                        
                            
                                
                                     Interactions between gastric acid secretagogues and the localization of the gastrin receptor.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic literature review
2008
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Jianu, Constantin; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Syversen, Unni.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Fundic gland polyps induced by proton pump inhibition are not relates to hypergastrinemia and serum chromogranin.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Nørsett, Kristin; 
                        
                    
                        
                            Lægreid, Astrid; 
                        
                    
                        
                            Kusnierczyk, Waclaw; 
                        
                    
                        
                            Langaas, Mette; 
                        
                    
                        
                            Ylving, S; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Changes in gene expression of gastric mucosa during therapeutic acid inhibition.
                                
                                
                            
                        
                    
                
                
                    
                    
                        European Journal of Gastroenterology and Hepathology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Gastric cancer: Animal studies on the risk of hypoacidity and hypergastrinemia.
                                
                                
                            
                        
                    
                
                
                    
                    
                        World Journal of Gastroenterology (WJG)
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Jianu, CS; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Syversen, Unni; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Serum gastrin and chromogranin A levels in patients with fundic gland polyps caused by long-term proton-pump inhibition.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Kleveland, Per Martin; 
                        
                    
                        
                            Brenna, Eiliv; 
                        
                    
                        
                            Bakke, Ingunn; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Martinsen, Tom Christian.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Interactions between gastric acid secretagogues and the localization of the gastrin receptor.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Brenna, Eiliv; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            soga, j.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Classification of tumours.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Experimental and Clinical Cancer Research
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Martinsen, T; 
                        
                    
                        
                            Skogaker, Nan Elisabeth Tostrup; 
                        
                    
                        
                            Fossmark, R; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Sandvik, A; 
                        
                    
                        
                            Walcum, H.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     The presence of malignant ecl cells in diffuse gastric carcinomas; An ultrastructural study with immunogold labelling of chromogranin A.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Annals of Oncology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Qvigstad, G; 
                        
                    
                        
                            Martinsen, TC; 
                        
                    
                        
                            Fossmark, R.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Controversies in the management of gastro-oesophageal diseases. Are all the gastric polyps 'bad'?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Abstract
2007
- 
                
                    
                        
                            Bendheim, Marianne Østensen; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Martinsen, Tom Christian.
                        
                    
                
                
                    (2007)
                
                
                    
                        
                        
                            
                                
                                     Morphology of g cells in hypergastrinemic cotton rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Laboratory Animal Science
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2007)
                
                
                    
                        
                        
                            
                                
                                     Rebound acid hypersecretion.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Jianu, Constantin; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Syversen, Unni; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2007)
                
                
                    
                        
                        
                            
                                
                                     Fundic gland polyps induced by proton pump inhibition are not realted to the level of hypergastrinemia and serum chromogranin A is affected by meals.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Brenna, E; 
                        
                    
                        
                            Waldum, HL.
                        
                    
                
                
                    (2007)
                
                
                    
                        
                        
                            
                                
                                     pH 4.0.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Editorial
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Jianu, Constantin; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Syversen, Unni; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2007)
                
                
                    
                        
                        
                            
                                
                                     Serum gastrin and chromogranin A levels in patients with fundic gland polyps caused by long-term proton pump inhibition.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
2006
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Brenna, Eiliv; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2006)
                
                
                    
                        
                        
                            
                                
                                     pH 4.0.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2006)
                
                
                    
                        
                        
                            
                                
                                     Signet ring cells in gastric carcinomas are derived from neuroendocrine cells.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Histochemistry and Cytochemistry
                    
                
                
                
                    Academic article
2005
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Bendheim, Marianne Østensen; 
                        
                    
                        
                            Kopstad, G.; 
                        
                    
                        
                            Kashima, K.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Ultrastructure and chromogranin A immunogold labelling of ECL cell carcinoids.
                                
                                
                            
                        
                    
                
                
                    
                    
                        APMIS - Journal of Pathologiy, Microbiology and Immunology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Johnsen, Geir; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Johannesen, Eli Marie.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Rebound acid hypersecretion after long-term inhibition of gastric acid secretion.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Kawase, S.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     The Japanese cotton rat develops spontaneously an ECL cell derived gastric carcinoma.
                                
                                
                            
                        
                    
                
                
                
                
                    Academic chapter/article/Conference paper
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Idiopathic gastric acid hypersecretion.
                                
                                
                            
                        
                    
                
                
                    
                    
                        European Journal of Gastroenterology and Hepathology
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Gustafsson, Bjørn; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Antiulcer drugs and gastric cancer.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Digestive Diseases and Sciences
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Mahler, M; 
                        
                    
                        
                            Heidtmann, W; 
                        
                    
                        
                            Niewiesk, S; 
                        
                    
                        
                            Gruber, A; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Beil, W.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Experimental Helicobacter pylori infection induces antral-predominant, chronic active gastritis in hispid cotton rats (Sigmodon hispidus).
                                
                                
                            
                        
                    
                
                
                    
                    
                        Helicobacter
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Nørsett, Kristin; 
                        
                    
                        
                            Lægreid, Astrid; 
                        
                    
                        
                            Langaas, Mette; 
                        
                    
                        
                            Wørlund, Sara Maria; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Molecular characterization of rat gastric mucosal response to potent acid inhibition.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Physiological Genomics
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Gustafsson, Bjørn; 
                        
                    
                        
                            Tømmerås, Karin; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Loennechen, Jan Pål; 
                        
                    
                        
                            Brunsvik, Anders; 
                        
                    
                        
                            Solligård, Erik.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Long-term serotonin administration induces heart valve disease in rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Circulation
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Zhao, Chun-Mei; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Kawase, Shiro; 
                        
                    
                        
                            Chen, Duan; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Dedifferentiation of enterochromaffin-like cells in gastric cancer of hypergastrinemic cotton rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        APMIS - Journal of Pathologiy, Microbiology and Immunology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Zhao, Chun-Mei; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Kawase, Shiro; 
                        
                    
                        
                            Chen, Duan; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Dedifferentiation of enterochromaffin-like cells in gastric cancer of cotton rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        APMIS - Journal of Pathologiy, Microbiology and Immunology
                    
                
                
                
                    Academic article
2004
- 
                
                    
                        
                            Fossmark, R; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Kawase, S; 
                        
                    
                        
                            Torp, Sverre Helge; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2004)
                
                
                    
                        
                        
                            
                                
                                     Hypergastrinaemia induced by partial corpectomy results in development of enterochromaffin-like cell carcinoma in male Japanese cotton rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Torp, Sverre Helge; 
                        
                    
                        
                            Kawase, S; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2004)
                
                
                    
                        
                        
                            
                                
                                     Spontaneous enterochromaffin-like cell carcinomas in cotton rats (Sigmodon hispidus) are prevented by a somatostatin analogue.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Endocrine-Related Cancer
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Kawase, S; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2004)
                
                
                    
                        
                        
                            
                                
                                     ECL-cell derived gastric cancer in male cotton rats dosed with the H2-blocker loxtidine.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Cancer Research
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, R; 
                        
                    
                        
                            Bakke, Ingunn; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Qvigstad, G.
                        
                    
                
                
                    (2004)
                
                
                    
                        
                        
                            
                                
                                     Hypergastrinemia in animals and man: Causes and consequences.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic literature review
2003
- 
                
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Kawase, Shiro; 
                        
                    
                        
                            Håkanson, Rolf; 
                        
                    
                        
                            Torp, Sverre Helge; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, G.
                        
                    
                
                
                    (2003)
                
                
                    
                        
                        
                            
                                
                                     Spontaneous ECL cell carcinomas in cotton rats: natural course and prevention by a gastrin receptor antagonist.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Carcinogenesis
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Torp, S; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2003)
                
                
                    
                        
                        
                            
                                
                                     Spontaneous ECL cell carcinomas in cotton rats are prevented by a somatostatin analouge.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Endocrine-Related Cancer
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Kawase, Shiro; 
                        
                    
                        
                            Håkanson, R; 
                        
                    
                        
                            Torp, Sverre Helge; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, G.
                        
                    
                
                
                    (2003)
                
                
                    
                        
                        
                            
                                
                                     SpontaneousECL cell carcinomas in cotton rats. Natural course and the effect of a gastrin receptor antagonist.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Carcinogenesis
                    
                
                
                
                    Academic article
Journal publications
- 
                
                    
                        
                            Dubois, Leonard; 
                        
                    
                        
                            Seksik, Philippe; 
                        
                    
                        
                            Nancey, Stephane; 
                        
                    
                        
                            Nachury, Maria; 
                        
                    
                        
                            Treton, Xavier; 
                        
                    
                        
                            Buisson, Anthony.
                        
                    
                
                
                    (2025)
                
                
                    
                        
                        
                            
                                
                                     UNCOVERING THE DYNAMICS OF MUCOSA-ASSOCIATED MICROBIOTAIN POST-OPERATIVE RECURRENCE OF CROHN’S DISEASE.
                                
                                
                            
                        
                    
                
                
                    
                    
                        United European Gastroenterology Journal (UEG Journal)
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Olaisen, Maya.
                        
                    
                
                
                    (2024)
                
                
                    
                        
                        
                            
                                
                                     Changes in the Gastrointestinal Microbiota Induced by Proton Pump Inhibitors—A Review of Findings from Experimental Trials.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Microorganisms
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2024)
                
                
                    
                        
                        
                            
                                
                                     Eradication of Helicobacter pylori by a potassium-competitive acid blocker alone?.
                                
                                
                            
                        
                    
                
                
                
                
                    Feature article
- 
                
                    
                        
                            Straum, Synne; 
                        
                    
                        
                            Bringaker, Karoline Wollan; 
                        
                    
                        
                            Rekstad, Lars Cato; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2024)
                
                
                    
                        
                        
                            
                                
                                     Esophageal cancers missed at upper endoscopy in Central Norway 2004 to 2021 – A population-based study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        BMC Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Kvamme, Camilla Jørdre; 
                        
                    
                        
                            Stillingen, Thomas Lindmo; 
                        
                    
                        
                            Sandø-Klemmetvoll, Alina Desiree; 
                        
                    
                        
                            Mjønes, Patricia Gjertrud; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2024)
                
                
                    
                        
                        
                            
                                
                                     Early Gastric Cancers in Central Norway 2001 to 2016—A Population-Based Study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Cancers
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Våge, Christina; 
                        
                    
                        
                            Ubøe, Ann Amelia Savage; 
                        
                    
                        
                            Sandø, Alina Desiree; 
                        
                    
                        
                            Mjønes, Patricia Gjertrud; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2024)
                
                
                    
                        
                        
                            
                                
                                     Epstein–Barr Virus and Clinico-Endoscopic Characteristics of Gastric Remnant Cancers Compared to Proximal Non-Remnant Cancers: A Population-Based Study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Cancers
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Berg, Sigrid; 
                        
                    
                        
                            Amini, Naseh; 
                        
                    
                        
                            Solberg, Stian; 
                        
                    
                        
                            Ødegård, Rønnaug Astri; 
                        
                    
                        
                            Kulseng, Bård Eirik; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2024)
                
                
                    
                        
                        
                            
                                
                                     Ex Vivo Demonstration of a Novel Dual-Frequency Ultrasound Method for Quantitative Measurements of Liver Fat Content.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Ultrasound in Medicine and Biology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Helseplattformen må lukkes.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Adresseavisen
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Lirhus, Sandre Svatun; 
                        
                    
                        
                            Høivik, Marte Lie.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     The impact of proton pump inhibitors on the course of ulcerative colitis: a cohort study of over 10,000 newly diagnosed patients in Norway.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Inflammation and Digestive Cancer.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Molecular Sciences
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Sørdal, Øystein Finset.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Is empiric proton pump inhibition in patients with symptoms of extraesophageal gastroesophageal reflux justified?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        BMC Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Fasting, Magnus Hølmo.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Dysplasi og tidlig kreft i øsofagus.
                                
                                
                            
                        
                    
                
                
                    
                    
                        NGF-nytt
                    
                
                
                
                    Article in business/trade/industry journal
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Dalsbø, Peter Lefstad; 
                        
                    
                        
                            Rokseth, Kjell Morten; 
                        
                    
                        
                            Hauso, Øyvind.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Laser lithotripsy for the treatment of a giant fecalith obstructing a colorectal anastomosis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Endoscopy
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Folkestad, Oddry H; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Mjønes, Patricia Gjertrud; 
                        
                    
                        
                            Fougner, Reidun; 
                        
                    
                        
                            Wasmuth, Hans; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Survival Trends in Patients with Small Intestinal Neuroendocrine Tumours—A Cohort Study in Central Norway.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Cancers
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Ubøe, Ann Amelia Savage; 
                        
                    
                        
                            Våge, Christina; 
                        
                    
                        
                            Mjønes, Patricia Gjertrud; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Gastric remnant cancer and long-term survival in Central Norway 2001 to 2016 – A population-based study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Surgial oncology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Hauge, Tobias.
                        
                    
                
                
                    (2023)
                
                
                    
                        
                        
                            
                                
                                     Surveillance ved Barretts øsofagus.
                                
                                
                            
                        
                    
                
                
                    
                    
                        NGF-nytt
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     Reply to "Too Soon to Dismiss Inflammation-Related Differences in the Mucosa-Associated Microbiota in Crohn's Disease Patients".
                                
                                
                            
                        
                    
                
                
                    
                    
                        Inflammatory Bowel Diseases
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     Proton pump inhibitors and mortality.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Richard, Mathias L.; 
                        
                    
                        
                            Beisvag, Vidar; 
                        
                    
                        
                            Granlund, Atle van Beelen; 
                        
                    
                        
                            Røyset, Elin Synnøve; 
                        
                    
                        
                            Rué, Olivier.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     The ileal fungal microbiota is altered in Crohn's disease and is associated with the disease course.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Frontiers in Medicine
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Beck, Marianne; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     Ventrikkelcancer oversett ved gastroskopi i Midt-Norge 2007-2016 – En populasjonsbasert studie.
                                
                                
                            
                        
                    
                
                
                    
                    
                        NGF-nytt
                    
                
                
                
                    Article in business/trade/industry journal
- 
                
                    
                        
                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Lagergren, Jesper; 
                        
                    
                        
                            Grønbech, Jon Erik; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     Hypergastrinemia and mortality in gastric adenocarcinoma: a population-based cohort study, the HUNT study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Johannessen, Rune; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Mjønes, Patricia.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     Do Gastric Signet Ring Cell Carcinomas and ECL-Cell Neuroendocrine Tumours Have a Common Origin?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Medicina
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Ausen, Kjersti; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Spigset, Olav; 
                        
                    
                        
                            Pleym, Hilde.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     Safety and Efficacy of Local Tranexamic Acid for the Prevention of Surgical Bleeding in Soft-Tissue Surgery: A Review of the Literature and Recommendations for Plastic Surgery.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Plastic and Reconstructive Surgery
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Sandvik, Elfrid Christine Smith; 
                        
                    
                        
                            Aasarød, Kristin Matre; 
                        
                    
                        
                            Johnsen, Gjermund; 
                        
                    
                        
                            Hoff, Dag Arne Lihaug; 
                        
                    
                        
                            Kulseng, Bård Eirik; 
                        
                    
                        
                            Hyldmo, Åsne Ask.
                        
                    
                
                
                    (2022)
                
                
                    
                        
                        
                            
                                
                                     The Effect of Roux-en-Y Gastric Bypass on Non-Alcoholic Fatty Liver Disease Fibrosis Assessed by FIB-4 and NFS Scores—An 11.6-Year Follow-Up Study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Clinical Medicine
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Aasarød, Kristin Matre; 
                        
                    
                        
                            Mosti, Mats Peder; 
                        
                    
                        
                            Teie, Malin Isabell; 
                        
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Syversen, Unni.
                        
                    
                
                
                    (2021)
                
                
                    
                        
                        
                            
                                
                                     Do patients with gastroesophageal reflux disease exhibit compromised bone quality prior to proton pump inhibitor therapy?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Bone Reports
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Lagergren, Jesper; 
                        
                    
                        
                            Grønbech, Jon Erik; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2021)
                
                
                    
                        
                        
                            
                                
                                     HYPERGASTRINEMIA IS NOT ASSOCIATED WITH INCREASED MORTALITY IN GASTRIC ADENOCARCINOMA.
                                
                                
                            
                        
                    
                
                
                    
                    
                        United European Gastroenterology Journal (UEG Journal)
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Folkestad, Oddry; 
                        
                    
                        
                            Wasmuth, Hans; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Fougner, Reidun; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2021)
                
                
                    
                        
                        
                            
                                
                                     Survival and disease recurrence in patients with duodenal neuroendocrine tumours—a single centre cohort.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Cancers
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2021)
                
                
                    
                        
                        
                            
                                
                                     Gastritis, Gastric Polyps and Gastric Cancer.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Molecular Sciences
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Beck, Marianne; 
                        
                    
                        
                            Bringeland, Erling A.; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2021)
                
                
                    
                        
                        
                            
                                
                                     Gastric cancers missed at upper endoscopy in central norway 2007 to 2016—a population-based study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Cancers
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Melberg, Hans Olav.
                        
                    
                
                
                    (2021)
                
                
                    
                        
                        
                            
                                
                                     Factors associated with the persistence of oral 5-aminosalicylic acid monotherapy in ulcerative colitis: a nationwide Norwegian cohort study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Therapeutic Advances in Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Flatberg, Arnar; 
                        
                    
                        
                            Granlund, Atle van Beelen; 
                        
                    
                        
                            Røyset, Elin Synnøve; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Sandvik, Arne Kristian.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     Bacterial Mucosa-associated Microbiome in Inflamed and Proximal Noninflamed Ileum of Patients With Crohn's Disease.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Inflammatory Bowel Diseases
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Folkestad, Oddry H; 
                        
                    
                        
                            Wasmuth, Hans; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Fougner, Reidun; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     Survival and disease recurrence in patients operated for small intestinal neuroendocrine tumors at a referral hospital.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Surgial oncology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Mattsson, Fredrik; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Lagergren, Jesper; 
                        
                    
                        
                            Grønbech, Jon Erik.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     Hypergastrinemia is associated with an increased risk of gastric adenocarcinoma with proximal location: A prospective population-based nested case-control study.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Cancer
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Bringeland, Erling Audun; 
                        
                    
                        
                            Mattsson, Fredrik; 
                        
                    
                        
                            Lagergren, Jesper; 
                        
                    
                        
                            Grønbech, Jon Erik; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     Hypergastrinemia is associated with proximal and intestinal type gastric adenocarcinoma.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Aasarød, Kristin Matre; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Flatberg, Arnar; 
                        
                    
                        
                            Mjønes, Patricia.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     Gastric Corpus Mucosal Hyperplasia and
Neuroendocrine Cell Hyperplasia, but not
Spasmolytic Polypeptide-Expressing Metaplasia,
Is Prevented by a Gastrin Receptor Antagonist in
H+/K+ATPase Beta Subunit Knockout Mice.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Molecular Sciences
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Flatberg, Arnar; 
                        
                    
                        
                            Granlund, Atle van Beelen; 
                        
                    
                        
                            Røyset, Elin Synnøve; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Sandvik, Arne Kristian.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     P833 Bacterial mucosa-associated microbiome in inflamed and proximal non-inflamed ileum of patients with Crohn’s disease.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Crohn's and Colitis
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Melberg, Hans Olav.
                        
                    
                
                
                    (2020)
                
                
                    
                        
                        
                            
                                
                                     P760 Differences in persistence of oral mesalazine preparations as monotherapy in patients with ulcerative colitis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Crohn's and Colitis
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Spigset, Olav; 
                        
                    
                        
                            Flatberg, Arnar; 
                        
                    
                        
                            Granlund, Atle van Beelen; 
                        
                    
                        
                            Brede, wenche Rødseth; 
                        
                    
                        
                            Albrektsen, Grethe.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     Mucosal 5-aminosalicylic acid concentration, drug formulation and mucosal microbiome in patients with quiescent ulcerative colitis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     The phylogeny and biological function of gastric juice-microbiological consequences of removing gastric acid.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Molecular Sciences
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     Editorial: mesalamine and mucosal microbiome in quiescent ulcerative colitis – what can we learn? Authors reply.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     Role of Autoimmune Gastritis in Gastric Cancer.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Clinical and Translational Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Balto, Tine Marie; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Grønbech, Jon Erik; 
                        
                    
                        
                            Munkvold, Bjørn; 
                        
                    
                        
                            Mjønes, Patricia.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     Hepatic micrometastases outside macrometastases are present in all patients with ileal neuroendocrine primary tumour at the time of liver resection.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     Adverse effects of proton pump inhibitors – evidence and plausibility.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Molecular Sciences
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2018)
                
                
                    
                        
                        
                            
                                
                                     Proton pump inhibitors (PPIs) may cause gastric cancer – clinical consequences.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2018)
                
                
                    
                        
                        
                            
                                
                                     Types of gastric carcinomas.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Molecular Sciences
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Öberg, Kjell; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Gustafsson, Björn; 
                        
                    
                        
                            Mjønes, Patricia.
                        
                    
                
                
                    (2018)
                
                
                    
                        
                        
                            
                                
                                     Not only stem cells, but also mature cells, particularly neuroendocrine cells, may develop into tumours: time for a paradigm shift.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Therapeutic Advances in Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2018)
                
                
                    
                        
                        
                            
                                
                                     Proton pump inhibitors and gastric cancer: a long expected side effect finally reported also in man.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gut
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Vange, Pål; 
                        
                    
                        
                            Bruland, Torunn; 
                        
                    
                        
                            Doseth, Berit; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sousa, Mirta; 
                        
                    
                        
                            Beisvag, Vidar.
                        
                    
                
                
                    (2017)
                
                
                    
                        
                        
                            
                                
                                     The cytoprotective protein clusterin is overexpressed in hypergastrinemic rodent models of oxyntic preneoplasia and promotes gastric cancer cell survival.
                                
                                
                            
                        
                    
                
                
                    
                    
                        PLOS ONE
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sandvik, Arne Kristian.
                        
                    
                
                
                    (2017)
                
                
                    
                        
                        
                            
                                
                                     Expression of the cholecystokinin-B receptor in neoplastic gastric cells.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Hormones and Cancer
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Brenna, Eiliv; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Does long-term profound inhibition of gastric acid secretion increase the risk of ECL cell-derived tumors in man?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Boyce, Malcolm; 
                        
                    
                        
                            Moore, Andrew; 
                        
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Parsons, Bryony; 
                        
                    
                        
                            Varro, Andrea; 
                        
                    
                        
                            Campbell, Fiona.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Netazepide, a gastrin/cholecystokinin-2 receptor antagonist, can eradicate gastric neuroendocrine tumours in patients with autoimmune chronic atrophic gastritis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        British Journal of Clinical Pharmacology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Mjønes, Patricia Gjertrud; 
                        
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Boyce, Malcolm; 
                        
                    
                        
                            Waldum, Helge Lyder; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     The gastrin receptor antagonist netazepide (YF476) in patients with type 1 gastric enterochromaffin-like cell neuroendocrine tumours: Review of long-term treatment.
                                
                                
                            
                        
                    
                
                
                    
                    
                        European Journal of Gastroenterology and Hepathology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Mjønes, Patricia.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Follow-up of patients with ECL cell-derived tumours.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Adverse Effects of Proton Pump Inhibitors in Chronic Kidney Disease.
                                
                                
                            
                        
                    
                
                
                    
                    
                        JAMA Internal Medicine
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Ness-Jensen, Eivind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     To the editor.
                                
                                
                            
                        
                    
                
                
                    
                    
                        JAMA Internal Medicine
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Aasarød, Kristin Matre; 
                        
                    
                        
                            Ramezanzadehkoldeh, Masoud; 
                        
                    
                        
                            Shabestari, Maziar; 
                        
                    
                        
                            Mosti, Mats Peder; 
                        
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Reseland, Janne Elin.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Skeletal effects of a gastrin receptor antagonist in H+/K+ATPase beta subunit KO mice.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Endocrinology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Rao, Shalini; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Munkvold, Bjørn; 
                        
                    
                        
                            Flatberg, Arnar; 
                        
                    
                        
                            Varro, Andrea.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     PAI-1 deficiency increases the trophic effects of hypergastrinemia in the gastric corpus mucosa.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Peptides
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Calvete, Oriol; 
                        
                    
                        
                            Mjønes, Patricia; 
                        
                    
                        
                            Benitez, Javier; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     ECL-cell carcinoids and carcinoma in patients homozygous for an inactivating mutation in the gastric H<sup>+</sup>K<sup>+</sup>ATPase alpha subunit.
                                
                                
                            
                        
                    
                
                
                    
                    
                        APMIS - Journal of Pathologiy, Microbiology and Immunology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Aasarød, Kristin Matre; 
                        
                    
                        
                            Mosti, Mats Peder; 
                        
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Reseland, Janne Elin; 
                        
                    
                        
                            Basso, Trude; 
                        
                    
                        
                            Syversen, Unni.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Impaired skeletal health in patients with chronic atrophic gastritis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Aasarød, Kristin Matre; 
                        
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Mosti, Mats Peder; 
                        
                    
                        
                            Ramezanzadehkoldeh, Masoud; 
                        
                    
                        
                            Viggaklev, Bjørn Ivar; 
                        
                    
                        
                            Reseland, Janne Elin.
                        
                    
                
                
                    (2016)
                
                
                    
                        
                        
                            
                                
                                     Effects of the histamine 1 receptor antagonist cetirizine on the osteoporotic phenotype in H+ /K+ ATPase beta subunit KO mice.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Cellular Biochemistry
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Olsen, Paul Anders S.; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar.
                        
                    
                
                
                    (2015)
                
                
                    
                        
                        
                            
                                
                                     Fecal calprotectin in patients with suspected small bowel disease – a selection tool for small bowel capsule endoscopy?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Ausen, Kjersti; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Spigset, Olav; 
                        
                    
                        
                            Pleym, Hilde.
                        
                    
                
                
                    (2015)
                
                
                    
                        
                        
                            
                                
                                     Randomized clinical trial of topical tranexamic acid after reduction mammoplasty.
                                
                                
                            
                        
                    
                
                
                    
                    
                        British Journal of Surgery
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2015)
                
                
                    
                        
                        
                            
                                
                                     Hypergastrinemia is associated with adenocarcinomas in the gastric corpus and shorter patient survival.
                                
                                
                            
                        
                    
                
                
                    
                    
                        APMIS - Journal of Pathologiy, Microbiology and Immunology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2015)
                
                
                    
                        
                        
                            
                                
                                     Letter: Proton pump inhibitors, hypergastrinaemia and the risk of gastric neoplasia.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Kleveland, Per Martin; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2015)
                
                
                    
                        
                        
                            
                                
                                     Upper gastrointestinal physiology and diseases.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     Serum gastrin in relation to localization and histological sub-classification of non-cardia adenocarcinomas in the stomach.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Sagatun, Liv; 
                        
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Mårvik, Ronald; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     The gastric mucosa 25 years after proxiaml gastric vagotomy.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     Gastrin May Mediate the Carcinogenic Effect of Helicobacter pylori Infection of the Stomach.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Digestive Diseases and Sciences
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Walenkamp, A; 
                        
                    
                        
                            Crespo, G; 
                        
                    
                        
                            Maya, F Fierro; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Igaz, P; 
                        
                    
                        
                            Rinke, A.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     Hallmarks of gastrointestinal neuroendocrine tumours: Implications for treatment.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Endocrine-Related Cancer
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Olsen, Paul A S; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     Fecal calprotectin in patients with suspected small bowel disease - A selection tool for small bowel capsule endoscopy?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     The regulation of gastric acid secretion - clinical perspectives.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Acta Physiologica
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Olaisen, Maya; 
                        
                    
                        
                            Rydning, Astrid; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Mjønes, Patricia Gjertrud; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2014)
                
                
                    
                        
                        
                            
                                
                                     Cytomegalovirus infection and postoperative complications in patients with ulcerative colitis undergoing colectomy.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     The effects of unilateral truncal vagotomy on gastric carcinogenesis in hypergastrinemic Japanese female cotton rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Regulatory Peptides
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Zeinali, Fatemeh; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Wiseth, Rune; 
                        
                    
                        
                            Hjertner, Øyvind; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Serotonin in blood: Assessment of its origin by concomitant determination of beta-thromboglobulin (platelets) and chromogranin A (enterochromaffin cells).
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Clinical and Laboratory Investigation
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Skarsvåg, Espen Christoffer; 
                        
                    
                        
                            Aarset, Harald; 
                        
                    
                        
                            Hjort-Hansen, Henrik; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Symptomatic primary (Al) amyloidosis of the stomach and duodenum.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Case Reports in Gastrointestinal Medicine
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Zwiggelaar, Rosalie Theda Margien; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Kidd, Mark; 
                        
                    
                        
                            Furnes, Marianne Waldum; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Tu1089 Somatostatin and the Slow-Growing Nature of Small Intestinal Neuroendocrine Tumors.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Vigen, Alexander; 
                        
                    
                        
                            Kodama, Yosuke; 
                        
                    
                        
                            Viset, Trond; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Kidd, Mark.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Immunohistochemical evidence for an impairment of autophagy in tumorigenesis of gastric carcinoids and adenocarcinomas in rodent models and patients.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Histology and Histopathology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Bretthauer, Michael; 
                        
                    
                        
                            Gustafsson, Björn.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Who should perform endoscopies? (Hvem bør utføre endoskopier?).
                                
                                
                            
                        
                    
                
                
                    
                    
                        Tidsskrift for Den norske legeforening (Tidsskriftet)
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Suren, Pål; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Karakterer på medisinstudiet bør gjeninnføres.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Dagens medisin
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Development of diffuse carcinomas in the gastric corpus in patients with rugal hyperplastic gastritis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        International Journal of Cancer
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Skarsvåg, Espen Christoffer; 
                        
                    
                        
                            Hjort-Hansen, Henrik; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     Symptomatic primary (AL) amyloidosis in the stomach and duodenum.
                                
                                
                            
                        
                    
                
                
                    
                    
                        BestPractice Gastroenterologi
                    
                
                
                
                    Article in business/trade/industry journal
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2013)
                
                
                    
                        
                        
                            
                                
                                     The Distressing Overuse of Gastric Acid Inhibitors.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Digestive Diseases and Sciences
                    
                
                
                
                    Editorial
- 
                
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Long-term use of proton pump inhibitors – consequences for the gastric mucosa.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Best Practice Onkologi/Hematologi
                    
                
                
                
                    Article in business/trade/industry journal
- 
                
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Gastric Carcinomas Localized to the Cardia.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology Research and Practice
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Lange, Ove Juel; 
                        
                    
                        
                            Viset, Trond; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Fougner, Reidun Lyngvi.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Gastric neuroendocrine carcinoma after long-term use of proton pump inhibitor.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Boyce, M.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Treatment of gastric carcinoids type 1 with the gastrin receptor antagonist netazepide (YF476) results in regression of tumours and normalisation of serum chromogranin A.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Sørdal, O.J.; 
                        
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Boyce, M; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     YF476, a Gastrin Receptor Antagonist, Causes Regression of Tumors and Normalizes Serum Chromogranin A in Patients with Type 1 Gastric Carcinoids.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Neuroendocrinology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Riis, Åse Garløv; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Clinical experience with infliximab and adalimumab in a single-center cohort of patients with Crohn's disease.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Erlandsen, Sten Even; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Bakke, Ingunn; 
                        
                    
                        
                            Chen, Duan; 
                        
                    
                        
                            Sandvik, Arne Kristian.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Regulated endocrine-specific protein 18 (RESP18) is localized to and regulated in A-like cells and G-cells in rat stomach.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Regulatory Peptides
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Vigen, Alexander; 
                        
                    
                        
                            Kodama, Yosuke; 
                        
                    
                        
                            Viset, Trond; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Kidd, Mark.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Impaired Autophagy in Gastric Carcinoids and Adenocarcinoma of Both Rodent Models and Patients.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Withdrawing PPI Therapy: Response to Metz et al.
                                
                                
                            
                        
                    
                
                
                    
                    
                        American Journal of Gastroenterology
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Petzold, Christiane; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Rubert, Marina; 
                        
                    
                        
                            Lian, Aina-Mari.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Decreased bone mineral density and reduced bone quality in H+/K+ ATPase beta-subunit deficient mice.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Cellular Biochemistry
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Viset, Trond; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Sørdal, Øystein Finset; 
                        
                    
                        
                            Mårvik, Ronald.
                        
                    
                
                
                    (2012)
                
                
                    
                        
                        
                            
                                
                                     Gastric carcinoids after long-term use of a proton pump inhibitor.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Westbroek, Irene; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Berge, Rolf Kristian; 
                        
                    
                        
                            Reseland, Janne Elin; 
                        
                    
                        
                            Syversen, Unni.
                        
                    
                
                
                    (2011)
                
                
                    
                        
                        
                            
                                
                                     Skeletal effects of the saturated 3-thia fatty acid tetradecylthioacetic acid in rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        PPAR Research
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Stunes, Astrid Kamilla; 
                        
                    
                        
                            Westbroek, Irene; 
                        
                    
                        
                            Gustafsson, Björn; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waarsing, Jan H; 
                        
                    
                        
                            Eriksen, Erik Fink.
                        
                    
                
                
                    (2011)
                
                
                    
                        
                        
                            
                                
                                     The peroxisome proliferator-activated receptor (PPAR) alpha agonist fenofibrate maintains bone mass, while the PPAR gamma agonist pioglitazone exaggerates bone loss, in ovariectomized rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        BMC Endocrine Disorders
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Syversen, Unni; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Fykse, Vidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2011)
                
                
                    
                        
                        
                            
                                
                                     Five-year follow-up of patients treated for 1 year with octreotide long-acting release for enterochromaffin-like cell carcinoids.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2011)
                
                
                    
                        
                        
                            
                                
                                     Animal models to study the role of long-term hypergastrinemia in gastric carcinogenesis.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Biomedicine and Biotechnology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Gustafsson, Björn; 
                        
                    
                        
                            Bakke, Ingunn; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Kidd, Mark; 
                        
                    
                        
                            Modlin, Irvin M; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2011)
                
                
                    
                        
                        
                            
                                
                                     Parietal cell activation by arborization of ECL cell cytoplasmic projections is likely the mechanism for histamine induced secretion of hydrochloric acid.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2010)
                
                
                    
                        
                        
                            
                                
                                     Long-term gastric changes in achlorhydric H+/K+-ATPase beta subunit deficient mice.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Syversen, Unni; 
                        
                    
                        
                            Hauso, Øyvind; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2010)
                
                
                    
                        
                        
                            
                                
                                     A meal test improves the specificity of chromogranin A as a marker of neuroendocrine neoplasia.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Tumour Biology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Kleveland, Per Martin; 
                        
                    
                        
                            Sandvik, Arne Kristian.
                        
                    
                
                
                    (2010)
                
                
                    
                        
                        
                            
                                
                                     Rebound acid hypersecretion from a physiological, pathophysiological and clinical viewpoint.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Skogaker, Nan E Tostrup; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Bendheim, Marianne Østensen.
                        
                    
                
                
                    (2010)
                
                
                    
                        
                        
                            
                                
                                     Neuroendocrine Cells in Diffuse Gastric Carcinomas: An Ultrastructural Study With Immunogold Labeling of Chromogranin A.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Applied immunohistochemistry & molecular morphology (Print)
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Jianu, Constantin-Sergiu; 
                        
                    
                        
                            Fossmark, R; 
                        
                    
                        
                            Syversen, U; 
                        
                    
                        
                            Hauso, O; 
                        
                    
                        
                            Waldum, H.
                        
                    
                
                
                    (2009)
                
                
                    
                        
                        
                            
                                
                                     A Meal-Test Improves the Specificity of Chromogranin A as a Marker of Neuroendocrine Neoplasia.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Neuroendocrinology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2009)
                
                
                    
                        
                        
                            
                                
                                     Effect of antrectomy in hypergastrinaemic female Japanese cotton rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Kleveland, Per Martin; 
                        
                    
                        
                            Brenna, Eiliv; 
                        
                    
                        
                            Bakke, Ingunn; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Martinsen, Tom Christian.
                        
                    
                
                
                    (2009)
                
                
                    
                        
                        
                            
                                
                                     Interactions between gastric acid secretagogues and the localization of the gastrin receptor.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Jianu, Constantin; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Syversen, Unni.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Fundic gland polyps induced by proton pump inhibition are not relates to hypergastrinemia and serum chromogranin.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Nørsett, Kristin; 
                        
                    
                        
                            Lægreid, Astrid; 
                        
                    
                        
                            Kusnierczyk, Waclaw; 
                        
                    
                        
                            Langaas, Mette; 
                        
                    
                        
                            Ylving, S; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Changes in gene expression of gastric mucosa during therapeutic acid inhibition.
                                
                                
                            
                        
                    
                
                
                    
                    
                        European Journal of Gastroenterology and Hepathology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Gastric cancer: Animal studies on the risk of hypoacidity and hypergastrinemia.
                                
                                
                            
                        
                    
                
                
                    
                    
                        World Journal of Gastroenterology (WJG)
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Jianu, CS; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Syversen, Unni; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Serum gastrin and chromogranin A levels in patients with fundic gland polyps caused by long-term proton-pump inhibition.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Kleveland, Per Martin; 
                        
                    
                        
                            Brenna, Eiliv; 
                        
                    
                        
                            Bakke, Ingunn; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Martinsen, Tom Christian.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Interactions between gastric acid secretagogues and the localization of the gastrin receptor.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Brenna, Eiliv; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            soga, j.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Classification of tumours.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Experimental and Clinical Cancer Research
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Martinsen, T; 
                        
                    
                        
                            Skogaker, Nan Elisabeth Tostrup; 
                        
                    
                        
                            Fossmark, R; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Sandvik, A; 
                        
                    
                        
                            Walcum, H.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     The presence of malignant ecl cells in diffuse gastric carcinomas; An ultrastructural study with immunogold labelling of chromogranin A.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Annals of Oncology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Qvigstad, G; 
                        
                    
                        
                            Martinsen, TC; 
                        
                    
                        
                            Fossmark, R.
                        
                    
                
                
                    (2008)
                
                
                    
                        
                        
                            
                                
                                     Controversies in the management of gastro-oesophageal diseases. Are all the gastric polyps 'bad'?.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Bendheim, Marianne Østensen; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Martinsen, Tom Christian.
                        
                    
                
                
                    (2007)
                
                
                    
                        
                        
                            
                                
                                     Morphology of g cells in hypergastrinemic cotton rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Laboratory Animal Science
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2007)
                
                
                    
                        
                        
                            
                                
                                     Rebound acid hypersecretion.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Jianu, Constantin; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Syversen, Unni; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2007)
                
                
                    
                        
                        
                            
                                
                                     Fundic gland polyps induced by proton pump inhibition are not realted to the level of hypergastrinemia and serum chromogranin A is affected by meals.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Gastroenterology
                    
                
                
                
                    Abstract
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Brenna, E; 
                        
                    
                        
                            Waldum, HL.
                        
                    
                
                
                    (2007)
                
                
                    
                        
                        
                            
                                
                                     pH 4.0.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Editorial
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Jianu, Constantin; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Syversen, Unni; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2007)
                
                
                    
                        
                        
                            
                                
                                     Serum gastrin and chromogranin A levels in patients with fundic gland polyps caused by long-term proton pump inhibition.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Brenna, Eiliv; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2006)
                
                
                    
                        
                        
                            
                                
                                     pH 4.0.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2006)
                
                
                    
                        
                        
                            
                                
                                     Signet ring cells in gastric carcinomas are derived from neuroendocrine cells.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Journal of Histochemistry and Cytochemistry
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Bendheim, Marianne Østensen; 
                        
                    
                        
                            Kopstad, G.; 
                        
                    
                        
                            Kashima, K.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Ultrastructure and chromogranin A immunogold labelling of ECL cell carcinoids.
                                
                                
                            
                        
                    
                
                
                    
                    
                        APMIS - Journal of Pathologiy, Microbiology and Immunology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Johnsen, Geir; 
                        
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Johannesen, Eli Marie.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Rebound acid hypersecretion after long-term inhibition of gastric acid secretion.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Alimentary Pharmacology and Therapeutics
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Idiopathic gastric acid hypersecretion.
                                
                                
                            
                        
                    
                
                
                    
                    
                        European Journal of Gastroenterology and Hepathology
                    
                
                
                
                    Reader opinion piece
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Gustafsson, Bjørn; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Antiulcer drugs and gastric cancer.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Digestive Diseases and Sciences
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Mahler, M; 
                        
                    
                        
                            Heidtmann, W; 
                        
                    
                        
                            Niewiesk, S; 
                        
                    
                        
                            Gruber, A; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Beil, W.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Experimental Helicobacter pylori infection induces antral-predominant, chronic active gastritis in hispid cotton rats (Sigmodon hispidus).
                                
                                
                            
                        
                    
                
                
                    
                    
                        Helicobacter
                    
                
                
                
                    Academic article
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                            Nørsett, Kristin; 
                        
                    
                        
                            Lægreid, Astrid; 
                        
                    
                        
                            Langaas, Mette; 
                        
                    
                        
                            Wørlund, Sara Maria; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Molecular characterization of rat gastric mucosal response to potent acid inhibition.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Physiological Genomics
                    
                
                
                
                    Academic article
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                            Gustafsson, Bjørn; 
                        
                    
                        
                            Tømmerås, Karin; 
                        
                    
                        
                            Nordrum, Ivar Skjåk; 
                        
                    
                        
                            Loennechen, Jan Pål; 
                        
                    
                        
                            Brunsvik, Anders; 
                        
                    
                        
                            Solligård, Erik.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Long-term serotonin administration induces heart valve disease in rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Circulation
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Zhao, Chun-Mei; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Kawase, Shiro; 
                        
                    
                        
                            Chen, Duan; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Dedifferentiation of enterochromaffin-like cells in gastric cancer of hypergastrinemic cotton rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        APMIS - Journal of Pathologiy, Microbiology and Immunology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Zhao, Chun-Mei; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Kawase, Shiro; 
                        
                    
                        
                            Chen, Duan; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     Dedifferentiation of enterochromaffin-like cells in gastric cancer of cotton rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        APMIS - Journal of Pathologiy, Microbiology and Immunology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, R; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Kawase, S; 
                        
                    
                        
                            Torp, Sverre Helge; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2004)
                
                
                    
                        
                        
                            
                                
                                     Hypergastrinaemia induced by partial corpectomy results in development of enterochromaffin-like cell carcinoma in male Japanese cotton rats.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Torp, Sverre Helge; 
                        
                    
                        
                            Kawase, S; 
                        
                    
                        
                            Sandvik, Arne Kristian; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2004)
                
                
                    
                        
                        
                            
                                
                                     Spontaneous enterochromaffin-like cell carcinomas in cotton rats (Sigmodon hispidus) are prevented by a somatostatin analogue.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Endocrine-Related Cancer
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Kawase, S; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2004)
                
                
                    
                        
                        
                            
                                
                                     ECL-cell derived gastric cancer in male cotton rats dosed with the H2-blocker loxtidine.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Cancer Research
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, R; 
                        
                    
                        
                            Bakke, Ingunn; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Qvigstad, G.
                        
                    
                
                
                    (2004)
                
                
                    
                        
                        
                            
                                
                                     Hypergastrinemia in animals and man: Causes and consequences.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Scandinavian Journal of Gastroenterology
                    
                
                
                
                    Academic literature review
- 
                
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Kawase, Shiro; 
                        
                    
                        
                            Håkanson, Rolf; 
                        
                    
                        
                            Torp, Sverre Helge; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, G.
                        
                    
                
                
                    (2003)
                
                
                    
                        
                        
                            
                                
                                     Spontaneous ECL cell carcinomas in cotton rats: natural course and prevention by a gastrin receptor antagonist.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Carcinogenesis
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Torp, S; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2003)
                
                
                    
                        
                        
                            
                                
                                     Spontaneous ECL cell carcinomas in cotton rats are prevented by a somatostatin analouge.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Endocrine-Related Cancer
                    
                
                
                
                    Academic article
- 
                
                    
                        
                            Martinsen, Tom Christian; 
                        
                    
                        
                            Kawase, Shiro; 
                        
                    
                        
                            Håkanson, R; 
                        
                    
                        
                            Torp, Sverre Helge; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, G.
                        
                    
                
                
                    (2003)
                
                
                    
                        
                        
                            
                                
                                     SpontaneousECL cell carcinomas in cotton rats. Natural course and the effect of a gastrin receptor antagonist.
                                
                                
                            
                        
                    
                
                
                    
                    
                        Carcinogenesis
                    
                
                
                
                    Academic article
Part of book/report
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar.
                        
                    
                
                
                    (2019)
                
                
                    
                        
                        
                            
                                
                                     Enterochromaffin-like (ECL) Cells.
                                
                                
                            
                        
                    
                
                
                
                
                    Chapter
- 
                
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Waldum, Helge.
                        
                    
                
                
                    (2017)
                
                
                    
                        
                        
                            
                                
                                     Sykdommer i ventrikkel og duodenum.
                                
                                
                            
                        
                    
                
                
                
                
                    Chapter
- 
                
                    
                        
                            Waldum, Helge; 
                        
                    
                        
                            Fossmark, Reidar; 
                        
                    
                        
                            Qvigstad, Gunnar; 
                        
                    
                        
                            Bakkelund, Karin Elvenes; 
                        
                    
                        
                            Kawase, S.
                        
                    
                
                
                    (2005)
                
                
                    
                        
                        
                            
                                
                                     The Japanese cotton rat develops spontaneously an ECL cell derived gastric carcinoma.
                                
                                
                            
                        
                    
                
                
                
                
                    Academic chapter/article/Conference paper
Outreach
2025
- 
                
                    Academic lectureNess-Jensen, Eivind; Santoni, Giola; Radkiewicz, Cecilia; Euler-Chelpin, My von; Kauppila, Joonas H.; Birgisson, Helgi. (2025) LONG-TERM PROTON PUMP INHIBITOR USE AND RISK OF GASTRIC NEUROENDOCRINE NEOPLASMS IN A POPULATION-BASED STUDY FROM THE FIVE NORDIC COUNTRIES. ueg week 2025 , Berlin 2025-10-03 - 2025-10-06
- 
                
                    Academic lectureBringeland, Erling Audun; Ubøe, Ann Amelia Savage; Våge, Christina; Mjønes, Patricia Gjertrud; Fossmark, Reidar. (2025) Gastric remnant cancer in Central Norway 2001 to 2016 – A changing epidemiology and high rate of Epstein-Barr virus positivity. Norsk gastroenterologisk forenings årsmøte , Lillehammer 2025-02-06 - 2025-02-08
- 
                
                    Academic lectureMolnes, Sveinung; Spigset, Olav; Sagatun, Liv; Salvesen, Øyvind Olav; Fossmark, Reidar. (2025) Bruk av protonpumpehemmere blant voksne i Norge – En nasjonal studie av legemiddelbruk. Norsk gastroenterologisk forenings årsmøte , Lillehammer 2025-02-06 - 2025-02-08
- 
                
                    Academic lectureKvamme, Camilla Jørdre; Stillingen, Thomas Lindmo; Sandø, Alina Desiree; Mjønes, Patricia Gjertrud; Bringeland, Erling Audun; Fossmark, Reidar. (2025) Tidlig-cancer ventriculi i Midt-Norge 2001 til 2016 – Karakteristika og prediksjon av N0 status. Norsk gastroenterologisk forenings årsmøte , Lillehammer 2025-02-06 - 2025-02-08
2024
- 
                
                    PosterKvamme, Camilla J.; Stillingen, Thomas L.; Sandø-Klemmetvoll, Alina Desiree; Mjønes, Patricia Gjertrud; Bringeland, Erling Audun; Fossmark, Reidar. (2024) Early gastric cancers in Central Norway 2001 to 2016 – a population-based study. United gastroenterology week , Wien 2024-10-12 - 2024-10-15
- 
                
                    PosterMolnes, Sveinung; Spigset, Olav; Sagatun, Liv; Salvesen, Øyvind Olav; Fossmark, Reidar. (2024) The use of proton pump inhibitors among adults in Norway – a nationwide drug utilization study. United gastroenterology week , Wien 2024-10-12 - 2024-10-15
2023
- 
                
                    Academic lectureOlaisen, Maya; Richard, Mathias L.; Beisvåg, Vidar; Granlund, Atle van Beelen; Røyset, Elin Synnøve; Rue, Oliver. (2023) Soppmikrobiota i ileum er endret ved Crohns sykdom og er assosiert med sykdomsforløp. Norsk gastroenterologisk forenings årsmøte , Lillehammer 2023-02-09 - 2023-02-11
- 
                
                    Academic lectureFossmark, Reidar; Lirhus, Sandre Svatun; Høivik, Marte Lie. (2023) Protonpumpehemmere påvirker forløpet av ulcerøs colitt negativt - En kohortstudie av over 10000 nydiagnostiserte pasienter i Norge. Norsk gastroenterologisk forenings årsmøte , Lillehammer 2023-02-09 - 2023-02-11
- 
                
                    Academic lectureFolkestad, Oddry H; Hauso, Øyvind; Mjønes, Patricia Gjertrud; Fougner, Reidun; Wasmuth, Hans; Fossmark, Reidar. (2023) OVERLEVELSESTREND FOR PASIENTER MED ILEOJEJUNALE NEVROENDOKRINE TUMORES FRA 2005 TIL 2021 – EN KOHORTSTUDIE FRA MIDT-NORGE. Kirurgisk Høstmøte , Oslo 2023-10-23 - 2023-10-27
2022
- 
                
                    PosterSandvik, Elfrid Christine Smith; Aasarød, Kristin Matre; Sandvik, Jorunn; Fossmark, Reidar. (2022) The Effect of Roux-en-Y Gastric Bypass on Non-Alcoholic Fatty Liver Disease Fibrosis Assessed by FIB-4 and NFS Scores-An 11.6-Year Follow-Up Study. United European Gastroenterology Week , Wien 2022-10-08 - 2022-10-11
- 
                
                    Academic lectureFolkestad, Oddry H; Wasmuth, Hans; Mjønes, Patricia; Fougner, Reidun; Hauso, Øyvind; Fossmark, Reidar. (2022) Neuroendokrine tumores i duodenum: et materiale fra St. Olavs Hospital. Norsk gastroenterologisk forenings årsmøte , Digitalt 2022-02-10 - 2022-02-11
2021
- 
                
                    Academic lectureFolkestad, Oddry H; Wasmuth, Hans; Mjønes, Patricia; Fougner, Reidun; Hauso, Øyvind; Fossmark, Reidar. (2021) Long overall survival and low disease recurrence in patients with duodenal neuroendocrine tumours. United European Gastroenterology Week , Virtuel 2021-10-02 - 2021-10-06
- 
                
                    PosterOlaisen, Maya; Richard, Mathias L; Beisvag, Vidar; Granlund, Atle van Beelen; Røyset, Elin Synnøve; Martinsen, Tom Christian. (2021) Fungal microbiota in the ileal mucosa of patients with Crohn’s disease. United european gastroenterology Week , Virtual 2021-10-02 - 2021-10-06
- 
                
                    PosterNess-Jensen, Eivind; Bringeland, Erling Audun; Mjønes, Patricia; Lagergren, Jesper; Grønbech, Jon Erik; Waldum, Helge. (2021) HYPERGASTRINEMIA IS NOT ASSOCIATED WITH INCREASED MORTALITY IN GASTRIC ADENOCARCINOMA. ueg week virtual 2021 , Virtuelt 2021-10-03 - 2021-10-05
- 
                
                    Academic lectureFolkestad, Oddry H; Wasmuth, Hans; Mjønes, Patricia; Fougner, Reidun; Hauso, Øyvind; Fossmark, Reidar. (2021) Nevroendokrine tumors i duodenum: Et materiale fra St.Olavs Hospital. Norsk kirurgisk forenings høstmøte , Oslo 2021-10-25 - 2021-10-29
2020
- 
                
                    PosterNess-Jensen, Eivind; Bringeland, Erling Audun; Mattsson, Fredrik; Lagergren, Jesper; Grønbech, Jon Erik; Waldum, Helge. (2020) Hypergastrinemia is associated with proximal and intestinal type gastric adenocarcinoma. Digestive Disease Week (DDW) 2020 , Chicago 2020-05-02 - 2020-05-05
- 
                
                    Academic lectureNess-Jensen, Eivind; Bringeland, Erling Audun; Mattsson, Fredrik; Lagergren, Jesper; Grønbech, Jon Erik; Waldum, Helge. (2020) Hypergastrinemi er assosiert med forekomst av proksimale adenokarsinom i ventrikkel. Årsmøte i Norsk gastroenterologisk forening , Lillehammer 2020-02-06 - 2020-02-08
- 
                
                    Academic lectureFossmark, Reidar; Olaisen, Maya; Martinsen, Tom Christian; Melberg, Hans Olav. (2020) Forskjeller i medikamentoverlevelse mellom perorale mesalazin-preparater som monoterapi ved ulcerøs colitt. Norsk gastroenterologisk forenings årsmøte , Lillehammer 2020-02-06 - 2020-02-08
- 
                
                    PosterAasarød, Kristin Matre; Waldum, Helge; Stunes, Astrid Kamilla; Sandvik, Arne Kristian; Flatberg, Arnar; Mjønes, Patricia. (2020) Gastric corpus mucosal hyperplasia and neuroendocrine cell hyperplasia, but not spasmolytic polypeptide-expressing metaplasia is prevented by a gastrin-blocker in H+/K+ATPase beta subunit deficient mice. Digestive Disease Week 2020-05-02 - 2020-05-05
2019
- 
                
                    PosterFossmark, Reidar; Balto, Tine Marie; Martinsen, Tom Christian; Grønbech, Jon Erik; Munkvold, Bjørn; Mjønes, Patricia. (2019) Hepatic neuroendocrine (NE) micrometastases outside macrometastases are found in all patients with ileal primary tumour at the time of liver resection. European Neuroendocrine Tumour Society , Barcelona 2019-03-11 - 2019-03-13
- 
                
                    PosterOlaisen, Maya; Spigset, Olav; Rødseth, Brede Wenche; Flatberg, Arnar; Granlund, Atle van Beelen; Røyset, Elin Synnøve. (2019) Mucosal 5-ASA concentration is associated with changes in mucosal bacterial microbiome diversity and composition in patients with quiescent ulcerative colitis. 14th Congress of ECCO , København 2019-03-06 - 2019-03-09
- 
                
                    LectureFossmark, Reidar. (2019) Tarmbakterier, helse og sykdom. NTNU-kveld , Dokkhuset, Trondheim 2019-09-17 - 2019-09-17
- 
                
                    Academic lectureOlaisen, Maya; Spigset, Olav; Flatberg, Arnar; Granlund, Atle van Beelen; Rødseth, Brede Wenche; Albrektsen, Grethe. (2019) Mucosal 5-ASA konsentrasjon, 5-ASA formulering og mucosalt mikrobiom i venstre hemicolon og rektum hos pasienter med ulcerøs colitt. Norsk Gastroenterologisk Forening , Lillehammer 2019-02-08 - 2019-02-08
2018
- 
                
                    PosterOlaisen, Maya; Spigset, Olav; Sandvik, Arne Kristian; Albrektsen, Grethe; Røyset, Elin Synnøve; Martinsen, Tom Christian. (2018) Mucosal 5-ASA concentration in the left hemicolon and rectum in patients with quiescent ulcerative colitis. United European Gastroenterology Week (UEGW) , Wien 2018-10-20 - 2018-10-24
- 
                
                    Academic lectureBoyce, Malcolm; Moore, Andrew; Parsons, Bryony; Lloyd, Katy A.; Sagatun, Liv; Varro, Andrea. (2018) Netazepide, a gastrin/CCK2 receptor antagonist, can eradicate gastric neuroendocrine tumours in patients with autoimmune chronic atrophic gastritis. North American Neuroendocrine Tumour Society NANETS , Seattle 2018-10-04 - 2018-10-06
2016
- 
                
                    Academic lectureVange, Pål; Bruland, Torunn; Doseth, Berit; Sousa, Mirta; Sørdal, Øystein Finset; Qvigstad, Gunnar. (2016) The anti-apoptotic factor clusterin is involved in hypergastrinemia-induced remodeling of the gastric oxyntic mucosa. United European Gastroenterology Week 2016 , Wien 2016-10-17 - 2016-10-19
2015
- 
                
                    Academic lecturePaul, Olsen; Fossmark, Reidar; Qvigstad, Gunnar. (2015) Fekal calprotektin hos pasienter med mistenkt tynntarmsykdom – et seleksjonsverktøy før kapselendoskopi?. Norsk gastroenterologisk forenings årsmøte , Lillehammer 2015-02-05 - 2015-02-07
- 
                
                    Academic lectureZeinali, Fatemeh; Fossmark, Reidar; Hauso, Øyvind; Waldum, Helge. (2015) Plasma serotonin in the diagnosis of mid-gut carcinoids. Norsk gastroenterologisk forenings årsmøte , Lillehammer 2015-02-05 - 2015-02-07
- 
                
                    Academic lectureHolan, Astrid Buran; Kolarevic, Jelena; Fossmark, Reidar; Bakke, I.; Vadstein, Olav; Terjesen, Bendik Fyhn. (2015) Evaluation of membrane treatment effect on water quality in recrculating aquaculture systems (RAS) for post-smolts (Salmo salar). In Book of abstracts, p. 23. 3d Workshop on Recirculating Aquaculture Systems , Molde 2015-09-30 - 2015-10-01
- 
                
                    PosterAasarød, Kristin Matre; Ramezanzadehkoldeh, Masoud; Mosti, Mats Peder; Stunes, Astrid Kamilla; Reseland, Janne Elin; Skallerud, Bjørn Helge. (2015) The osteoporotic phenotype in H+/K+ATPase beta subunit KO-mice is not influenced by a histamine 1 receptor antagonist. Digestive disease week , Washington DC 2015-05-16 - 2015-05-19
- 
                
                    Academic lectureAasarød, Kristin Matre; Ramezanzadehkoldeh, Masoud; Shabestari, Maziar; Mosti, Mats Peder; Stunes, Astrid Kamilla; Reseland, Janne Elin. (2015) Den osteoporotiske fenotypen til H+/K+ATPase beta-subunit KO mus bedres av en gastrinreseptorantagonist, men ikke av en histamin-1-reseptorantagonist. Norsk gastroenterologisk forenings årsmøte , Lillehammer 2015-02-05 - 2015-02-07
- 
                
                    Academic lectureFossmark, Reidar; Rao, Shalini; Mjønes, Patricia; Munkvold, Bjørn; Varro, Andrea; Thommesen, Liv. (2015) PAI-1 inhibits gastrin induced proliferation of the gastric oxyntic mucosa. 51th NBS Contact Meeting , Longearbyen 2015-02-09 - 2015-02-13
2014
- 
                
                    Academic lectureOlaisen, Maya; Fossmark, Reidar; Rydning, Astrid; Martinsen, Tom Christian. (2014) Colectomi av pasienter med aktiv ulcerøs colitt, et tiårsmateriale fra St. Olavs Hospital, Trondheim. Norsk gastroenterologisk forenings årsmøte , Lillehammer 2014-01-30 - 2014-02-01
- 
                
                    PosterFossmark, Reidar; Sagatun, Liv; Sandvik, Arne Kristian; Waldum, Helge. (2014) Serum gastrin in relation to localization and histological sub-classification of non-cardia adenocarcinomas in the stomach. Digestive Disease Week , Chicago 2014-05-03 - 2014-05-06
- 
                
                    Academic lectureFossmark, Reidar; Sagatun, Liv; Sandvik, Arne Kristian; Waldum, Helge. (2014) Serum gastrin, lokalisering og histologisk subklassifikasjon av adenocarcinomer i ventrikkelen. Norsk gastroenterologisk forenings årsmøte , Lillehammer 2014-01-30 - 2014-02-01
- 
                
                    PosterTamagno, G; Crespo, G; Maya, FF; Fossmark, Reidar; Igaz, P; Rinke, A. (2014) Phase 1 and Phase 2 clinical trials investigating targets against the molecular hallmarks of gastroenteropancreatic neuroendocrine tumours. European Neuroendocrine Tumour Society conference , Barcelona 2014-03-05 - 2014-03-07
- 
                
                    Academic lectureAasarød, Kristin Matre; Ramezanzadehkoldeh, Masoud; Mosti, Mats Peder; Stunes, Astrid Kamilla; Viggaklev, Bjørn Ivar; Reseland, Janne Elin. (2014) Skeletal effects of the gastrin receptor antagonist netazepide in H+/K+-ATPase beta-subunit deficient mice. European Calcified Tissue Society , Praha 2014-05-17 - 2014-05-20
- 
                
                    PosterRamezanzadehkoldeh, Masoud; Aasarød, Kristin Matre; Fossmark, Reidar; Syversen, Unni; Skallerud, Bjørn Helge. (2014) Evaluation of mechanical properties of bone in proton pump knock-out mice treated with gastrin receptor antagonist using three-point bending and nanoindentation tests. 7 World Congress in Biomechanics , Boston 2014-07-06 - 2014-07-11
- 
                
                    PosterOlaisen, Maya; Rydning, Astrid; Martinsen, Tom Christian; Mjønes, Patricia Gjertrud; Nordrum, Ivar Skjåk; Fossmark, Reidar. (2014) Cytomegalovirus infection and postoperative complications in patients with ulcerative colitis undergoing colectomy. Digestive Disease Week 2014 , Chicago, Illinois 2014-05-03 - 2014-05-06
2013
- 
                
                    PosterZwiggelaar, Rosalie; Kidd, Mark; Gustafsson, Björn; Sandvik, Arne Kristian; Fossmark, Reidar; Furnes, Marianne Waldum. (2013) Somatostatin and the Slow-Growing Nature of Small Intestinal Neuroendocrine Tumors. DDW 2013-05-18 - 2013-05-21
- 
                
                    PosterFossmark, Reidar; Sørdal, Øystein Finset; Bakkelund, Karin Elvenes; Nordrum, Ivar Skjåk; Waldum, Helge. (2013) Unilateral truncal vagotomy reduces weight, oxyntic mucosal thickness and neuroendocrine cell density but does not prevent gastric carcinoma development in hypergastrinemic Japanese female cotton rats. Digestive Disease Week , Orlando 2013-05-18 - 2013-05-21
- 
                
                    LectureFossmark, Reidar; Jianu, Constantin-Sergiu; Waldum, Helge. (2013) Nevroendokrine svulster i magesekken. CarciNors årsmøte , Sandefjord 2013-03-16 - 2013-03-17
- 
                
                    LectureWaldum, Helge; Sørdal, Øystein Finset; Hauso, Øyvind; Qvigstad, Gunnar; Fossmark, Reidar. (2013) Does gastrin mediate the gastric carcinogenic effect of Helicobacter pylori infection?. International Conference on Gastroenterology & Urology , Chicago 2013-06-10 - 2013-06-12
- 
                
                    Academic lectureFossmark, Reidar; Sørdal, Øystein Finset; Bakkelund, Karin Elvenes; Nordrum, Ivar Skjåk; Waldum, Helge. (2013) Effekten av unilateral trunkal vagotomi på ventrikkelcarcinogenese hos hypergastrinemiske bomullsrotter. Norsk Gastroenterologisk Forenings 40. årsmøte , Lillehammer 2013-02-07 - 2013-02-09
2012
- 
                
                    Academic lectureRiis, Åse Garløv; Martinsen, Tom Christian; Waldum, Helge; Fossmark, Reidar. (2012) Langtidserfaringer med klinisk bruk av infliximab av adalimumab hos pasienter med Crohns sykdom på St. Olavs Hospital, Trondheim. Norsk Gastroenterologisk Forenings årsmøte , Lillehammer 2012-02-09 - 2012-02-11
- 
                
                    Academic lectureFossmark, Reidar; Sørdal, Øystein Finset; Jianu, Constantin-Sergiu; Qvigstad, Gunnar; Boyce, M; Waldum, Helge. (2012) Behandling av ventrikkelcarcinoider type 1 med en gastrinreceptor antagonist (YF476) gir tilbakegang av svulster og normalisering av chromogranin A. Norsk Gastroenterologisk Forenings årsmøte 2012-02-09 - 2012-02-11
- 
                
                    Academic lectureFossmark, Reidar; Sørdal, Øystein Finset; Jianu, Constantin-Sergiu; Qvigstad, Gunnar; Boyce, M; Waldum, Helge. (2012) Treatment of Gastric Carcinoids type 1 with the Gastrin Receptor Antagonist YF476 Results in Regression of Tumours and Normalisation of Serum Chromogranin A. Digestive Disease Week, AGA , San Diego 2012-05-19 -
- 
                
                    PosterFossmark, Reidar; Teie, Malin Isabell; Mosti, Mats Peder; Viggaklev, Bjørn Ivar; Stunes, Astrid Kamilla; Syversen, Unni. (2012) The effect of three months use of proton pump inhibitors on bone mineral density, bone markers and calcium metabolism in men with gastroesophageal reflux disease. Digestive Disease Week , San Diego 2012-05-19 - 2012-05-23
- 
                
                    Academic lectureFossmark, Reidar; Sørdal, Øystein Finset; Jianu, Constantin-Sergiu; Qvigstad, Gunnar; Boyce, M; Waldum, Helge. (2012) Treatment of Gastric Carcinoids type 1 with the Gastrin Receptor Antagonist YF476 Results in Regression of Tumours and Normalisation of Serum Chromogranin A. European Neuroendocrine Tumour Society , Copenhagen 2012-03-07 - 2012-03-09
2010
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                    Academic lectureJianu, Constantin-Sergiu; Fossmark, Reidar; Fykse, Vidar; Hauso, Øyvind; Viset, Trond; Waldum, Helge. (2010) Five-year follow-up of patients treated for one year with octreotide long-acting release for enterochromaffin-like cell carcinoids. Årsmøte Norsk gastroenterologisk forenings årsmøte , Lillehammer 2010-02-11 - 2010-02-13
2008
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                    Academic lectureStunes, Astrid Kamilla; Syversen, Unni; Waldum, Helge; Thommesen, Liv; Reseland, Janne E.; Rupert, Marina. (2008) Reduced bone mineral density and bone quality in HKATPase beta subunit knockout mice. Symposium 2008-11-20 - 2008-11-20
2007
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                    Academic lectureFossmark, Reidar. (2007) Fundic gland polyps induced by proton pump inhibition are not realted to the level og hypergastrinemia and serum chromogranin A is affected by meals. Digestive Disease Week , Washington 2007-05-19 - 2007-05-24
2005
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                    Academic lectureFossmark, Reidar; Johnsen, Gjermund; Johannessen, Elin; Waldum, Helge. (2005) Rebound acid hypersecretion after long-term inhibition of gastric acid secretion. Årsmøte , Lillehammer 2005-02-11 -
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                    Academic lectureFossmark, Reidar; Qvigstad, Gunnar; Westre, Bjørn; Waldum, Helge. (2005) ECL celle carcinoid oppstått under behandling med protonpumpehemmer. Midt-Norsk Gastroenterologisk forenings høstmøte , Trondheim 2005-12-02 - 2005-12-03
2003
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                    Academic lectureFossmark, Reidar; Martinsen, Tom Christian; Waldum, Helge. (2003) Hypergastrinemi indusert ved partiell corpectomi gir ECL celle carcinom hos han-bomullsrotter. Norsk Gastroenterologisk Forenings 30. årsmøte , Lillehammer 2003-02-09 -
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                    Academic lectureMartinsen, Tom Christian; Fossmark, Reidar; Waldum, Helge. (2003) Utvikling av spontane ECL celle carcinomer hos bomullsrotter forhindres av en somatostatinanalog. Norsk Gastroenterologisk Forenings 30. årsmøte , Lillehammer 2003-02-09 -
2002
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                    Academic lectureMartinsen, Tom Christian; Kawase, Shiro; Sandvik, Arne Kristian; Torp, Sverre Helge; Qvigstad, G; Fossmark, Reidar. (2002) Spontaneous invasive ECL-omas in cotton rats are prevented by a gastrin receptor antagonist. Digestive Disease Week 2002 , San Fransisco, USA 2002-05-22 -