Navigasjon

  • Hopp til innhold
NTNU Hjemmeside NTNU Hjemmeside

ntnu.no

  • Studier
    • Studere på NTNU
    • Finn studieprogram
    • Søke opptak
    • Videreutdanning og deltid
    • Forkurs og oppfriskning
  • Studentliv
    • Student i Gjøvik
    • Student i Trondheim
    • Student i Ålesund
  • Forskning og innovasjon
    • Forskning
    • Innovasjon
    • Satsingsområder
    • Toppforskning
    • Ekspertlister
    • Ph.d.
  • Om NTNU
    • Fakulteter og institutter
    • Sentre
    • Bibliotek
    • Kart
    • Ledige stillinger
    • Arrangement
    • Nyheter
    • Kontakt oss
    • Om NTNU
  1. Ansatte

Språkvelger

English

Reidar Fossmark

Last ned pressefoto
Last ned pressefoto
Foto:

Reidar Fossmark

Professor
Institutt for klinisk og molekylær medisin

reidar.fossmark@ntnu.no
93256882 72825164 Gastrosenteret, Øya, Prinsesse Kristinas gate 1
Om Publikasjoner Formidling

Om

Gruppetilhørighet: Gastroenterologi

Publikasjoner

  • Kronologisk
  • Etter kategori
  • Se alle publikasjoner i Cristin

2024

  • Waldum, Helge; Fossmark, Reidar. (2024) Eradication of Helicobacter pylori by a potassium-competitive acid blocker alone?. Scandinavian Journal of Gastroenterology
    Kronikk
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Fossmark, Reidar; Olaisen, Maya. (2024) Changes in the Gastrointestinal Microbiota Induced by Proton Pump Inhibitors—A Review of Findings from Experimental Trials. Microorganisms
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel

2023

  • Fossmark, Reidar; Hauge, Tobias. (2023) Surveillance ved Barretts øsofagus. NGF-nytt
    Vitenskapelig oversiktsartikkel/review
  • Fossmark, Reidar; Fasting, Magnus Hølmo. (2023) Dysplasi og tidlig kreft i øsofagus. NGF-nytt
    Fagartikkel
  • Waldum, Helge; Fossmark, Reidar. (2023) Inflammation and Digestive Cancer. International Journal of Molecular Sciences
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Fossmark, Reidar. (2023) Helseplattformen må lukkes. Adresseavisen
    Leserinnlegg
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig oversiktsartikkel/review

2022

  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Beck, Marianne; Bringeland, Erling Audun; Qvigstad, Gunnar; Fossmark, Reidar. (2022) Ventrikkelcancer oversett ved gastroskopi i Midt-Norge 2007-2016 – En populasjonsbasert studie. NGF-nytt
    Fagartikkel
  • 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
    Vitenskapelig artikkel
  • Waldum, Helge; Fossmark, Reidar. (2022) Proton pump inhibitors and mortality. Gastroenterology
    Brev til redaktøren
  • 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
    Brev til redaktøren
  • 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
    Short communication
  • 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
    Vitenskapelig artikkel

2021

  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Waldum, Helge; Fossmark, Reidar. (2021) Gastritis, Gastric Polyps and Gastric Cancer. International Journal of Molecular Sciences
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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)
    Sammendrag/abstract

2020

  • 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
    Sammendrag/abstract
  • 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
    Sammendrag/abstract
  • 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
    Sammendrag/abstract
  • Olaisen, Maya; Fossmark, Reidar. (2020) Nytt om 5-ASA ved ulcerøs colitt.
    Nettsider (opplysningsmateriale)
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel

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
    Vitenskapelig artikkel
  • Olaisen, Maya; Fossmark, Reidar. (2019) Editorial: mesalamine and mucosal microbiome in quiescent ulcerative colitis – what can we learn? Authors reply. Alimentary Pharmacology and Therapeutics
    Short communication
  • 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
    Vitenskapelig oversiktsartikkel/review
  • Waldum, Helge; Fossmark, Reidar. (2019) Enterochromaffin-like (ECL) Cells. Elsevier
    Faglig kapittel
  • 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
    Vitenskapelig artikkel
  • Waldum, Helge; Fossmark, Reidar. (2019) Role of Autoimmune Gastritis in Gastric Cancer. Clinical and Translational Gastroenterology
    Vitenskapelig artikkel
  • Fossmark, Reidar; Martinsen, Tom Christian; Waldum, Helge. (2019) Adverse effects of proton pump inhibitors – evidence and plausibility. International Journal of Molecular Sciences
    Vitenskapelig oversiktsartikkel/review

2018

  • Waldum, Helge; Fossmark, Reidar. (2018) Types of gastric carcinomas. International Journal of Molecular Sciences
    Vitenskapelig oversiktsartikkel/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
    Vitenskapelig oversiktsartikkel/review
  • Waldum, Helge; Sørdal, Øystein Finset; Fossmark, Reidar. (2018) Proton pump inhibitors (PPIs) may cause gastric cancer – clinical consequences. Scandinavian Journal of Gastroenterology
    Vitenskapelig oversiktsartikkel/review
  • Waldum, Helge; Fossmark, Reidar. (2018) Proton pump inhibitors and gastric cancer: a long expected side effect finally reported also in man. Gut
    Short communication

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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Fossmark, Reidar; Waldum, Helge. (2017) Sykdommer i ventrikkel og duodenum. Forlaget Vett & Viten AS
    Faglig kapittel

2016

  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Ness-Jensen, Eivind; Fossmark, Reidar. (2016) To the editor. JAMA Internal Medicine
    Brev til redaktøren
  • 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
    Vitenskapelig artikkel
  • Ness-Jensen, Eivind; Fossmark, Reidar. (2016) Adverse Effects of Proton Pump Inhibitors in Chronic Kidney Disease. JAMA Internal Medicine
    Brev til redaktøren
  • 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
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel

2015

  • Waldum, Helge; Hauso, Øyvind; Fossmark, Reidar. (2015) Letter: Proton pump inhibitors, hypergastrinaemia and the risk of gastric neoplasia. Alimentary Pharmacology and Therapeutics
    Brev til redaktøren
  • Ausen, Kjersti; Fossmark, Reidar; Spigset, Olav; Pleym, Hilde. (2015) Randomized clinical trial of topical tranexamic acid after reduction mammoplasty. British Journal of Surgery
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Waldum, Helge; Kleveland, Per Martin; Fossmark, Reidar. (2015) Upper gastrointestinal physiology and diseases. Scandinavian Journal of Gastroenterology
    Vitenskapelig artikkel

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
    Sammendrag/abstract
  • Waldum, Helge; Hauso, Øyvind; Fossmark, Reidar. (2014) The regulation of gastric acid secretion - clinical perspectives. Acta Physiologica
    Vitenskapelig oversiktsartikkel/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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Walenkamp, A; Crespo, G; Fierro Maya, F; Fossmark, Reidar; Igaz, P; Rinke, A. (2014) Hallmarks of gastrointestinal neuroendocrine tumours: Implications for treatment. Endocrine-Related Cancer
    Vitenskapelig oversiktsartikkel/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
    Vitenskapelig artikkel

2013

  • 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
    Vitenskapelig artikkel
  • 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
    Sammendrag/abstract
  • 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
    Vitenskapelig artikkel
  • Fossmark, Reidar; Waldum, Helge. (2013) Development of diffuse carcinomas in the gastric corpus in patients with rugal hyperplastic gastritis. International Journal of Cancer
    Leserinnlegg
  • Fossmark, Reidar; Bretthauer, Michael; Gustafsson, Björn. (2013) Who should perform endoscopies? (Hvem bør utføre endoskopier?). Tidsskrift for Den norske legeforening (Tidsskriftet)
    Short communication
  • Skarsvåg, Espen Christoffer; Hjort-Hansen, Henrik; Fossmark, Reidar. (2013) Symptomatic primary (AL) amyloidosis in the stomach and duodenum. BestPractice Gastroenterologi
    Fagartikkel
  • Fossmark, Reidar; Suren, Pål; Waldum, Helge. (2013) Karakterer på medisinstudiet bør gjeninnføres. Dagens medisin
    Brev til redaktøren
  • 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
    Vitenskapelig artikkel
  • Fossmark, Reidar; Waldum, Helge. (2013) The Distressing Overuse of Gastric Acid Inhibitors. Digestive Diseases and Sciences
    Leder
  • 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
    Vitenskapelig artikkel

2012

  • 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
    Vitenskapelig artikkel
  • Bakkelund, Karin Elvenes; Nordrum, Ivar Skjåk; Fossmark, Reidar; Waldum, Helge. (2012) Gastric Carcinomas Localized to the Cardia. Gastroenterology Research and Practice
    Vitenskapelig artikkel
  • Waldum, Helge; Sandvik, Arne Kristian; Hauso, Øyvind; Qvigstad, Gunnar; Fossmark, Reidar. (2012) Withdrawing PPI Therapy: Response to Metz et al. American Journal of Gastroenterology
    Leserinnlegg
  • 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
    Sammendrag/abstract
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Jianu, Constantin-Sergiu; Fossmark, Reidar; Waldum, Helge. (2012) Long-term use of proton pump inhibitors – consequences for the gastric mucosa. Best Practice Onkologi/Hematologi
    Fagartikkel
  • 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
    Sammendrag/abstract
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel

2011

  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel

2010

  • 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
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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)
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel

2009

  • 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
    Vitenskapelig oversiktsartikkel/review
  • 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
    Sammendrag/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
    Vitenskapelig artikkel

2008

  • 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
    Sammendrag/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
    Sammendrag/abstract
  • Waldum, Helge; Sandvik, Arne Kristian; Brenna, Eiliv; Fossmark, Reidar; Qvigstad, Gunnar; soga, j. (2008) Classification of tumours. Journal of Experimental and Clinical Cancer Research
    Vitenskapelig oversiktsartikkel/review
  • Fossmark, Reidar; Qvigstad, Gunnar; Waldum, Helge. (2008) Gastric cancer: Animal studies on the risk of hypoacidity and hypergastrinemia. World Journal of Gastroenterology (WJG)
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig oversiktsartikkel/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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel

2007

  • Fossmark, Reidar; Waldum, Helge. (2007) Rebound acid hypersecretion. Alimentary Pharmacology and Therapeutics
    Leserinnlegg
  • Fossmark, Reidar; Brenna, E; Waldum, HL. (2007) pH 4.0. Scandinavian Journal of Gastroenterology
    Leder
  • 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
    Sammendrag/abstract
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel

2006

  • Fossmark, Reidar; Brenna, Eiliv; Waldum, Helge. (2006) pH 4.0. Scandinavian Journal of Gastroenterology
    Brev til redaktøren
  • 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
    Vitenskapelig artikkel

2005

  • Waldum, Helge; Fossmark, Reidar. (2005) Idiopathic gastric acid hypersecretion. European Journal of Gastroenterology and Hepathology
    Brev til redaktøren
  • Waldum, Helge; Gustafsson, Bjørn; Fossmark, Reidar; Qvigstad, Gunnar. (2005) Antiulcer drugs and gastric cancer. Digestive Diseases and Sciences
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Waldum, Helge; Fossmark, Reidar; Qvigstad, Gunnar; Bakkelund, Karin Elvenes; Kawase, S. (2005) The Japanese cotton rat develops spontaneously an ECL cell derived gastric carcinoma.
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
  • 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
    Vitenskapelig artikkel

2004

  • Waldum, Helge; Fossmark, R; Bakke, Ingunn; Martinsen, Tom Christian; Qvigstad, G. (2004) Hypergastrinemia in animals and man: Causes and consequences. Scandinavian Journal of Gastroenterology
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel

2003

  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel

Tidsskriftspublikasjoner

  • Waldum, Helge; Fossmark, Reidar. (2024) Eradication of Helicobacter pylori by a potassium-competitive acid blocker alone?. Scandinavian Journal of Gastroenterology
    Kronikk
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Fossmark, Reidar; Olaisen, Maya. (2024) Changes in the Gastrointestinal Microbiota Induced by Proton Pump Inhibitors—A Review of Findings from Experimental Trials. Microorganisms
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Fossmark, Reidar; Hauge, Tobias. (2023) Surveillance ved Barretts øsofagus. NGF-nytt
    Vitenskapelig oversiktsartikkel/review
  • Fossmark, Reidar; Fasting, Magnus Hølmo. (2023) Dysplasi og tidlig kreft i øsofagus. NGF-nytt
    Fagartikkel
  • Waldum, Helge; Fossmark, Reidar. (2023) Inflammation and Digestive Cancer. International Journal of Molecular Sciences
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Fossmark, Reidar. (2023) Helseplattformen må lukkes. Adresseavisen
    Leserinnlegg
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Beck, Marianne; Bringeland, Erling Audun; Qvigstad, Gunnar; Fossmark, Reidar. (2022) Ventrikkelcancer oversett ved gastroskopi i Midt-Norge 2007-2016 – En populasjonsbasert studie. NGF-nytt
    Fagartikkel
  • 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
    Vitenskapelig artikkel
  • Waldum, Helge; Fossmark, Reidar. (2022) Proton pump inhibitors and mortality. Gastroenterology
    Brev til redaktøren
  • 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
    Brev til redaktøren
  • 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
    Short communication
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Waldum, Helge; Fossmark, Reidar. (2021) Gastritis, Gastric Polyps and Gastric Cancer. International Journal of Molecular Sciences
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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)
    Sammendrag/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
    Sammendrag/abstract
  • 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
    Sammendrag/abstract
  • 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
    Sammendrag/abstract
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Olaisen, Maya; Fossmark, Reidar. (2019) Editorial: mesalamine and mucosal microbiome in quiescent ulcerative colitis – what can we learn? Authors reply. Alimentary Pharmacology and Therapeutics
    Short communication
  • 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
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • Waldum, Helge; Fossmark, Reidar. (2019) Role of Autoimmune Gastritis in Gastric Cancer. Clinical and Translational Gastroenterology
    Vitenskapelig artikkel
  • Fossmark, Reidar; Martinsen, Tom Christian; Waldum, Helge. (2019) Adverse effects of proton pump inhibitors – evidence and plausibility. International Journal of Molecular Sciences
    Vitenskapelig oversiktsartikkel/review
  • Waldum, Helge; Fossmark, Reidar. (2018) Types of gastric carcinomas. International Journal of Molecular Sciences
    Vitenskapelig oversiktsartikkel/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
    Vitenskapelig oversiktsartikkel/review
  • Waldum, Helge; Sørdal, Øystein Finset; Fossmark, Reidar. (2018) Proton pump inhibitors (PPIs) may cause gastric cancer – clinical consequences. Scandinavian Journal of Gastroenterology
    Vitenskapelig oversiktsartikkel/review
  • Waldum, Helge; Fossmark, Reidar. (2018) Proton pump inhibitors and gastric cancer: a long expected side effect finally reported also in man. Gut
    Short communication
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Ness-Jensen, Eivind; Fossmark, Reidar. (2016) To the editor. JAMA Internal Medicine
    Brev til redaktøren
  • 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
    Vitenskapelig artikkel
  • Ness-Jensen, Eivind; Fossmark, Reidar. (2016) Adverse Effects of Proton Pump Inhibitors in Chronic Kidney Disease. JAMA Internal Medicine
    Brev til redaktøren
  • 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
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Waldum, Helge; Hauso, Øyvind; Fossmark, Reidar. (2015) Letter: Proton pump inhibitors, hypergastrinaemia and the risk of gastric neoplasia. Alimentary Pharmacology and Therapeutics
    Brev til redaktøren
  • Ausen, Kjersti; Fossmark, Reidar; Spigset, Olav; Pleym, Hilde. (2015) Randomized clinical trial of topical tranexamic acid after reduction mammoplasty. British Journal of Surgery
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Waldum, Helge; Kleveland, Per Martin; Fossmark, Reidar. (2015) Upper gastrointestinal physiology and diseases. Scandinavian Journal of Gastroenterology
    Vitenskapelig artikkel
  • 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
    Sammendrag/abstract
  • Waldum, Helge; Hauso, Øyvind; Fossmark, Reidar. (2014) The regulation of gastric acid secretion - clinical perspectives. Acta Physiologica
    Vitenskapelig oversiktsartikkel/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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Walenkamp, A; Crespo, G; Fierro Maya, F; Fossmark, Reidar; Igaz, P; Rinke, A. (2014) Hallmarks of gastrointestinal neuroendocrine tumours: Implications for treatment. Endocrine-Related Cancer
    Vitenskapelig oversiktsartikkel/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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Sammendrag/abstract
  • 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
    Vitenskapelig artikkel
  • Fossmark, Reidar; Waldum, Helge. (2013) Development of diffuse carcinomas in the gastric corpus in patients with rugal hyperplastic gastritis. International Journal of Cancer
    Leserinnlegg
  • Fossmark, Reidar; Bretthauer, Michael; Gustafsson, Björn. (2013) Who should perform endoscopies? (Hvem bør utføre endoskopier?). Tidsskrift for Den norske legeforening (Tidsskriftet)
    Short communication
  • Skarsvåg, Espen Christoffer; Hjort-Hansen, Henrik; Fossmark, Reidar. (2013) Symptomatic primary (AL) amyloidosis in the stomach and duodenum. BestPractice Gastroenterologi
    Fagartikkel
  • Fossmark, Reidar; Suren, Pål; Waldum, Helge. (2013) Karakterer på medisinstudiet bør gjeninnføres. Dagens medisin
    Brev til redaktøren
  • 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
    Vitenskapelig artikkel
  • Fossmark, Reidar; Waldum, Helge. (2013) The Distressing Overuse of Gastric Acid Inhibitors. Digestive Diseases and Sciences
    Leder
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Bakkelund, Karin Elvenes; Nordrum, Ivar Skjåk; Fossmark, Reidar; Waldum, Helge. (2012) Gastric Carcinomas Localized to the Cardia. Gastroenterology Research and Practice
    Vitenskapelig artikkel
  • Waldum, Helge; Sandvik, Arne Kristian; Hauso, Øyvind; Qvigstad, Gunnar; Fossmark, Reidar. (2012) Withdrawing PPI Therapy: Response to Metz et al. American Journal of Gastroenterology
    Leserinnlegg
  • 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
    Sammendrag/abstract
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Jianu, Constantin-Sergiu; Fossmark, Reidar; Waldum, Helge. (2012) Long-term use of proton pump inhibitors – consequences for the gastric mucosa. Best Practice Onkologi/Hematologi
    Fagartikkel
  • 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
    Sammendrag/abstract
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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)
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig oversiktsartikkel/review
  • 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
    Sammendrag/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
    Vitenskapelig artikkel
  • 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
    Sammendrag/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
    Sammendrag/abstract
  • Waldum, Helge; Sandvik, Arne Kristian; Brenna, Eiliv; Fossmark, Reidar; Qvigstad, Gunnar; soga, j. (2008) Classification of tumours. Journal of Experimental and Clinical Cancer Research
    Vitenskapelig oversiktsartikkel/review
  • Fossmark, Reidar; Qvigstad, Gunnar; Waldum, Helge. (2008) Gastric cancer: Animal studies on the risk of hypoacidity and hypergastrinemia. World Journal of Gastroenterology (WJG)
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig oversiktsartikkel/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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Fossmark, Reidar; Waldum, Helge. (2007) Rebound acid hypersecretion. Alimentary Pharmacology and Therapeutics
    Leserinnlegg
  • Fossmark, Reidar; Brenna, E; Waldum, HL. (2007) pH 4.0. Scandinavian Journal of Gastroenterology
    Leder
  • 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
    Sammendrag/abstract
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Fossmark, Reidar; Brenna, Eiliv; Waldum, Helge. (2006) pH 4.0. Scandinavian Journal of Gastroenterology
    Brev til redaktøren
  • 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
    Vitenskapelig artikkel
  • Waldum, Helge; Fossmark, Reidar. (2005) Idiopathic gastric acid hypersecretion. European Journal of Gastroenterology and Hepathology
    Brev til redaktøren
  • Waldum, Helge; Gustafsson, Bjørn; Fossmark, Reidar; Qvigstad, Gunnar. (2005) Antiulcer drugs and gastric cancer. Digestive Diseases and Sciences
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • Waldum, Helge; Fossmark, R; Bakke, Ingunn; Martinsen, Tom Christian; Qvigstad, G. (2004) Hypergastrinemia in animals and man: Causes and consequences. Scandinavian Journal of Gastroenterology
    Vitenskapelig oversiktsartikkel/review
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel
  • 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
    Vitenskapelig artikkel

Del av bok/rapport

  • Waldum, Helge; Fossmark, Reidar. (2019) Enterochromaffin-like (ECL) Cells. Elsevier
    Faglig kapittel
  • Fossmark, Reidar; Waldum, Helge. (2017) Sykdommer i ventrikkel og duodenum. Forlaget Vett & Viten AS
    Faglig kapittel
  • Waldum, Helge; Fossmark, Reidar; Qvigstad, Gunnar; Bakkelund, Karin Elvenes; Kawase, S. (2005) The Japanese cotton rat develops spontaneously an ECL cell derived gastric carcinoma.
    Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

Informasjonsmateriell

  • Olaisen, Maya; Fossmark, Reidar. (2020) Nytt om 5-ASA ved ulcerøs colitt.
    Nettsider (opplysningsmateriale)

Formidling

2025

  • Vitenskapelig foredrag
    Molnes, 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 forening Norsk gastroenterologisk forenings årsmøte , Lillehammer 2025-02-06 - 2025-02-08
  • Vitenskapelig foredrag
    Bringeland, 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 forening Norsk gastroenterologisk forenings årsmøte , Lillehammer 2025-02-06 - 2025-02-08
  • Vitenskapelig foredrag
    Kvamme, 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 forening Norsk gastroenterologisk forenings årsmøte , Lillehammer 2025-02-06 - 2025-02-08

2024

  • Poster
    Molnes, 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. UEG United gastroenterology week , Wien 2024-10-12 - 2024-10-15
  • Poster
    Kvamme, 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. UEG United gastroenterology week , Wien 2024-10-12 - 2024-10-15

2023

  • Vitenskapelig foredrag
    Folkestad, 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. Norsk kirurgisk forening Kirurgisk Høstmøte , Oslo 2023-10-23 - 2023-10-27
  • Vitenskapelig foredrag
    Fossmark, 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 forening Norsk gastroenterologisk forenings årsmøte , Lillehammer 2023-02-09 - 2023-02-11
  • Vitenskapelig foredrag
    Olaisen, 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 forening Norsk gastroenterologisk forenings årsmøte , Lillehammer 2023-02-09 - 2023-02-11

2022

  • Poster
    Sandvik, 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. UEG United European Gastroenterology Week , Wien 2022-10-08 - 2022-10-11
  • Vitenskapelig foredrag
    Folkestad, 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 forening Norsk gastroenterologisk forenings årsmøte , Digitalt 2022-02-10 - 2022-02-11

2021

  • Vitenskapelig foredrag
    Folkestad, 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 forening Norsk kirurgisk forenings høstmøte , Oslo 2021-10-25 - 2021-10-29
  • Poster
    Olaisen, 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 . UEG United european gastroenterology Week , Virtual 2021-10-02 - 2021-10-06
  • Vitenskapelig foredrag
    Folkestad, 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. UEG United European Gastroenterology Week , Virtuel 2021-10-02 - 2021-10-06
  • Poster
    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. UEG, United European Gastroenterology ueg week virtual 2021 , Virtuelt 2021-10-03 - 2021-10-05

2020

  • Vitenskapelig foredrag
    Fossmark, Reidar; Olaisen, Maya; Martinsen, Tom Christian; Melberg, Hans Olav. (2020) Forskjeller i medikamentoverlevelse mellom perorale mesalazin-preparater som monoterapi ved ulcerøs colitt. Norsk gastroenterologisk forening Norsk gastroenterologisk forenings årsmøte , Lillehammer 2020-02-06 - 2020-02-08
  • Vitenskapelig foredrag
    Ness-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. Norsk gastroenterologisk forening Årsmøte i Norsk gastroenterologisk forening , Lillehammer 2020-02-06 - 2020-02-08
  • Poster
    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-blocker in H+/K+ATPase beta subunit deficient mice. American Gastroenterological Association Digestive Disease Week 2020-05-02 - 2020-05-05
  • Poster
    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. Digestive Disease Week Digestive Disease Week (DDW) 2020 , Chicago 2020-05-02 - 2020-05-05

2019

  • Vitenskapelig foredrag
    Olaisen, Maya; Spigset, Olav; Flatberg, Arnar; Granlund, Atle van Beelen; Wenche Rødseth, Brede; Albrektsen, Grethe. (2019) Mucosal 5-ASA konsentrasjon, 5-ASA formulering og mucosalt mikrobiom i venstre hemicolon og rektum hos pasienter med ulcerøs colitt. NGF, Legeforeningen Norsk Gastroenterologisk Forening , Lillehammer 2019-02-08 - 2019-02-08
  • Poster
    Olaisen, Maya; Spigset, Olav; Wenche Rødseth, Brede; 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. . European Crohns and Colitis Organisation 14th Congress of ECCO , København 2019-03-06 - 2019-03-09
  • Populærvitenskapelig foredrag
    Fossmark, Reidar. (2019) Tarmbakterier, helse og sykdom. NTNU NTNU-kveld , Dokkhuset, Trondheim 2019-09-17 - 2019-09-17
  • Poster
    Fossmark, 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. ENETS European Neuroendocrine Tumour Society , Barcelona 2019-03-11 - 2019-03-13

2018

  • Poster
    Olaisen, 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. UEG United European Gastroenterology Week (UEGW) , Wien 2018-10-20 - 2018-10-24
  • Vitenskapelig foredrag
    Boyce, 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 North American Neuroendocrine Tumour Society NANETS , Seattle 2018-10-04 - 2018-10-06

2016

  • Vitenskapelig foredrag
    Vange, 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

  • Poster
    Aasarød, 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. American Gastroenterolocal Association Digestive disease week , Washington DC 2015-05-16 - 2015-05-19
  • Vitenskapelig foredrag
    Aasarød, 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 forening Norsk gastroenterologisk forenings årsmøte , Lillehammer 2015-02-05 - 2015-02-07
  • Vitenskapelig foredrag
    Zeinali, Fatemeh; Fossmark, Reidar; Hauso, Øyvind; Waldum, Helge. (2015) Plasma serotonin in the diagnosis of mid-gut carcinoids. Norsk gastroenterologisk forening Norsk gastroenterologisk forenings årsmøte , Lillehammer 2015-02-05 - 2015-02-07
  • Vitenskapelig foredrag
    Paul, Olsen; Fossmark, Reidar; Qvigstad, Gunnar. (2015) Fekal calprotektin hos pasienter med mistenkt tynntarmsykdom – et seleksjonsverktøy før kapselendoskopi?. Norsk gastroenterologisk forening Norsk gastroenterologisk forenings årsmøte , Lillehammer 2015-02-05 - 2015-02-07
  • Vitenskapelig foredrag
    Fossmark, Reidar; Rao, Shalini; Mjønes, Patricia; Munkvold, Bjørn; Varro, Andrea; Thommesen, Liv. (2015) PAI-1 inhibits gastrin induced proliferation of the gastric oxyntic mucosa. Norsk biokjemisk selskap 51th NBS Contact Meeting , Longearbyen 2015-02-09 - 2015-02-13
  • Vitenskapelig foredrag
    Holan, 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

2014

  • Poster
    Ramezanzadehkoldeh, 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
  • Vitenskapelig foredrag
    Fossmark, Reidar; Sagatun, Liv; Sandvik, Arne Kristian; Waldum, Helge. (2014) Serum gastrin, lokalisering og histologisk subklassifikasjon av adenocarcinomer i ventrikkelen. Norsk gastroenterologisk forening Norsk gastroenterologisk forenings årsmøte , Lillehammer 2014-01-30 - 2014-02-01
  • Poster
    Olaisen, 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 Digestive Disease Week 2014 , Chicago, Illinois 2014-05-03 - 2014-05-06
  • Poster
    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. American Gastroenterological Association Digestive Disease Week , Chicago 2014-05-03 - 2014-05-06
  • Vitenskapelig foredrag
    Olaisen, 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 forening Norsk gastroenterologisk forenings årsmøte , Lillehammer 2014-01-30 - 2014-02-01
  • Poster
    Tamagno, 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 European Neuroendocrine Tumour Society conference , Barcelona 2014-03-05 - 2014-03-07
  • Vitenskapelig foredrag
    Aasarød, 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 European Calcified Tissue Society , Praha 2014-05-17 - 2014-05-20

2013

  • Poster
    Zwiggelaar, 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
  • Poster
    Fossmark, 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 Digestive Disease Week , Orlando 2013-05-18 - 2013-05-21
  • Populærvitenskapelig foredrag
    Fossmark, Reidar; Jianu, Constantin-Sergiu; Waldum, Helge. (2013) Nevroendokrine svulster i magesekken. CarciNor CarciNors årsmøte , Sandefjord 2013-03-16 - 2013-03-17
  • Faglig foredrag
    Waldum, Helge; Sørdal, Øystein Finset; Hauso, Øyvind; Qvigstad, Gunnar; Fossmark, Reidar. (2013) Does gastrin mediate the gastric carcinogenic effect of Helicobacter pylori infection?. OMNIC International Conference on Gastroenterology & Urology , Chicago 2013-06-10 - 2013-06-12
  • Vitenskapelig foredrag
    Fossmark, 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 Forening Norsk Gastroenterologisk Forenings 40. årsmøte , Lillehammer 2013-02-07 - 2013-02-09

2012

  • Vitenskapelig foredrag
    Fossmark, 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. American Gastroenterological Association Digestive Disease Week, AGA , San Diego 2012-05-19 -
  • Vitenskapelig foredrag
    Fossmark, 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 Forening Norsk Gastroenterologisk Forenings årsmøte 2012-02-09 - 2012-02-11
  • Vitenskapelig foredrag
    Riis, 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 Forening Norsk Gastroenterologisk Forenings årsmøte , Lillehammer 2012-02-09 - 2012-02-11
  • Vitenskapelig foredrag
    Fossmark, 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 European Neuroendocrine Tumour Society , Copenhagen 2012-03-07 - 2012-03-09
  • Poster
    Fossmark, 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. American Gastroenterological Association Digestive Disease Week , San Diego 2012-05-19 - 2012-05-23

2010

  • Vitenskapelig foredrag
    Jianu, 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. Norsk gastroenterologisk forening Årsmøte Norsk gastroenterologisk forenings årsmøte , Lillehammer 2010-02-11 - 2010-02-13

2008

  • Vitenskapelig foredrag
    Stunes, 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

  • Vitenskapelig foredrag
    Fossmark, 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

  • Vitenskapelig foredrag
    Fossmark, Reidar; Qvigstad, Gunnar; Westre, Bjørn; Waldum, Helge. (2005) ECL celle carcinoid oppstått under behandling med protonpumpehemmer. Midt-Norsk Gastroenterologisk forening Midt-Norsk Gastroenterologisk forenings høstmøte , Trondheim 2005-12-02 - 2005-12-03
  • Vitenskapelig foredrag
    Fossmark, Reidar; Johnsen, Gjermund; Johannessen, Elin; Waldum, Helge. (2005) Rebound acid hypersecretion after long-term inhibition of gastric acid secretion. Norsk Gastroenterologisk Forening Årsmøte , Lillehammer 2005-02-11 -

2003

  • Vitenskapelig foredrag
    Martinsen, 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 -
  • Vitenskapelig foredrag
    Fossmark, 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 -

2002

  • Vitenskapelig foredrag
    Martinsen, 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 -

NTNU – Norges teknisk-naturvitenskapelige universitet

  • For ansatte
  • |
  • For studenter
  • |
  • Innsida
  • |
  • Blackboard

Studere

  • Om studier
  • Studieprogram
  • Emner
  • Videreutdanning
  • Karriere

Aktuelt

  • Nyheter
  • Arrangement
  • Jobbe ved NTNU

Om NTNU

  • Om NTNU
  • Bibliotek
  • Strategi
  • Forskning
  • Satsingsområder
  • Innovasjon
  • Organisasjonskart
  • Utdanningskvalitet

Kontakt

  • Kontakt oss
  • Finn ansatte
  • Spør en ekspert
  • Pressekontakter
  • Kart

NTNU i tre byer

  • NTNU i Gjøvik
  • NTNU i Trondheim
  • NTNU i Ålesund

Om nettstedet

  • Bruk av informasjonskapsler
  • Tilgjengelighetserklæring
  • Personvern
  • Ansvarlig redaktør
Facebook Instagram Linkedin Snapchat Tiktok Youtube
Logg inn
NTNU logo