Ampulla of Vater Pancreatobiliary Type Adenocarcinoma

**Semantic type:** Neoplastic Process

**Definition:** An invasive adenocarcinoma that arises from the ampulla of Vater. It is characterized by the presence of malignant cells that resemble the malignant cells of the pancreatic ductal or extrahepatic bile duct carcinomas.

**Synonyms:** - Pancreatobiliary-type carcinoma