label: Ampulla of Vater Pancreatobiliary Type Adenocarcinoma
label_lc: ampulla of vater pancreatobiliary type adenocarcinoma
description: 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.