label: Zollinger Ellison Syndrome
label_lc: zollinger ellison syndrome
description: A syndrome characterized by the presence of a gastrin-secreting tumor, usually in the pancreas or duodenum, resulting in increased gastric acidity and formation of gastric ulcers. Signs and symptoms include abdominal pain and diarrhea. It may be sporadic or a manifestation of multiple endocrine neoplasia type 1.