Ampullary cancer, or ampullary carcinoma, is a cancer that forms in a body part called the ampulla of Vater. The ampulla of Vater is a small opening that enters into the first portion of the small intestine, known as the duodenum. The ampulla of Vater is the spot where the pancreatic and bile ducts …
https://www.hopkinsmedicine.org/health/conditions-and-diseases/ampullary-cancer