Pancreas: all types of pancreas malignancies

Common Bile Duct: the duct where the pancreatic and bile ducts (leading from the liver) converge. Cancers of the bile duct are often called "Klatskin's tumors" or "cholangiocarcinomas".

Ampulla of Vater (not indicated on diagram): The ampulla is a sphincter around the point where the common bile duct enters the duodenum. It is distinct from both the pancreas and duodenum.

Duodenum: the first portion of the small intestine, leading from the stomach, wrapping around the head of the pancreas.