perihilar bile duct

Definition of perihilar bile duct cancer
National Cancer Institute

perihilar bile duct cancer

(PAYR-ee-HY-ler bile dukt KAN-ser)
Cancer that forms in the area where the left and right hepatic ducts join just outside the liver and form the common hepatic duct. Bile ducts carry bile from the liver and gallbladder to the small intestine. Perihilar bile duct cancer is a type of extrahepatic bile duct cancer. Also called Klatskin tumor and perihilar cholangiocarcinoma.

Source: NCI Dictionary of Cancer Terms