Reidar Fossmark
Publications
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
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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
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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
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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
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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
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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
-
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
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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
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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
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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
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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
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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
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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
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Waldum, Helge;
Fossmark, Reidar.
(2019)
Role of Autoimmune Gastritis in Gastric Cancer.
Clinical and Translational Gastroenterology
Academic article
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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
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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
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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
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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
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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
-
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
-
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
-
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
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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
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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
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Waldum, Helge;
Fossmark, Reidar.
(2019)
Enterochromaffin-like (ECL) Cells.
Chapter
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Fossmark, Reidar;
Waldum, Helge.
(2017)
Sykdommer i ventrikkel og duodenum.
Chapter
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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LectureFossmark, Reidar. (2019) Tarmbakterier, helse og sykdom. NTNU-kveld , Dokkhuset, Trondheim 2019-09-17 - 2019-09-17
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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LectureFossmark, Reidar; Jianu, Constantin-Sergiu; Waldum, Helge. (2013) Nevroendokrine svulster i magesekken. CarciNors årsmøte , Sandefjord 2013-03-16 - 2013-03-17
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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
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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
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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
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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
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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 -
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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
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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 -