Malignant Gastrinoma

**Semantic type:** Neoplastic Process

**Definition:** A gastrin-producing neuroendocrine tumor. It is characterized by inappropriate secretion of gastrin and associated with Zollinger Ellison syndrome. It displays vascular invasion and metastasizes to other anatomic sites.

**Synonyms:** - G cell tumor, malignant - Gastrin cell tumor, malignant - Gastrinoma, malignant