A dilation of the duodenal papilla that is the opening of the juncture of the common bile duct and the main pancreatic duct.

http://upload.wikimedia.org/wikipedia/commons/1/1e/Biliary_system_new.svg

Ampulla formed by the union of the pancreatic duct and the common bile duct where they enter the intestine.[TAO]

ampulla of Vater, biliaropancreatic ampulla, ampulla biliaropancreatica, papilla Vateri, Vater's ampulla, ampulla of bile duct

uberon

papilla duodeni major, ampulla Vaterii, ampulla hepatopancreatica

UBERON:0004913

http://purl.obolibrary.org/obo/cl.owl

• ventral pancreatic duct