Gastrin-producing neuroendocrine tumour that causes gastric acid hypersecretion and peptic ulcer disease.
Can be sporadic or associated with multiple endocrine neoplasia syndrome type 1.
Common presentation includes refractory peptic ulcer disease, abdominal pain, diarrhoea, and gastro-oesophageal disease.
The main goal of treatment is control of gastric hypersecretion with proton-pump inhibitors.
The most common cause of morbidity and mortality is metastatic gastrinoma.
Zollinger-Ellison syndrome (ZES) is a condition caused by a gastrin-secreting tumour that causes hypersecretion of gastric acid leading to ulcer disease. It most commonly presents with abdominal pain (70% to 100%), diarrhoea (37% to 73%), and gastro-oesophageal reflux disease (44%). Less common presentations include weight loss, GI bleeding, nausea, and vomiting.  
Professor of Medicine
Division of Gastroenterology, Hepatology, and Parenteral Nutrition
David Geffen School of Medicine at University of California
VA Greater Los Angeles Healthcare System
Department of Veterans Affairs
JRP is an author of a number of references cited in this monograph.
Division of Gastroenterology and Hepatology
University of Texas Health Sciences Center
DG declares that he has no competing interests.
Division of Digestive Diseases
JB declares that she has no competing interests.
Dr Joseph R. Pisegna, Dr Deepinder Goyal, and Dr Jihane Benhammou would like to gratefully acknowledge Dr David Oh and Dr Hank Wang, the previous contributors to this monograph. DO and HW declare that they have no competing interests.
Associate Professor of Medicine Division
Gastroenterology, Hepatology and Nutrition
University of Florida
PD declares that he has no competing interests.
Newcastle-Upon-Tyne Hospitals Trust
PP declares that he has no competing interests.
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