What is Zollinger-Ellison syndrome (ZES)?

Updated: Apr 26, 2021
  • Author: BS Anand, MD; Chief Editor: Philip O Katz, MD, FACP, FACG  more...
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Answer

Zollinger-Ellison syndrome (ZES) is a rare disorder that can cause gastric or duodenal ulcers (usually multiple) from excessive acid secretion. Consider ZES if a patient has severe peptic ulceration, kidney stones, watery diarrhea, or malabsorption. ZES can also be associated with multiple endocrine neoplasia type I, which occurs earlier than isolated ZES. Patients with ZES usually have fasting serum gastrin levels of more than 200 pg/mL and basal gastric acid hypersecretion of more than 15 mEq/h. Proton pump inhibitor (PPI) therapy should be discontinued at least 2 weeks before the gastrin level is measured.


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