Zollinger Ellison Syndrome

**Semantic type:** Disease or Syndrome

**Definition:** 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.

**Synonyms:** - Zollinger-Ellison Syndrome - Zollinger-Ellison syndrome