perihilar bile duct

Pronunciation: (PAYR-ee-HY-ler bile dukt)

A small part of a duct (tube) called the extrahepatic bile duct that is just outside the liver and carries bile from the liver and gallbladder to the small intestine. The perihilar bile duct starts where the right and left hepatic ducts join outside the liver and form the common hepatic duct. It ends where a duct from the gallbladder joins to form the common bile duct. The perihilar bile duct is part of the biliary system.

Source: NCI Dictionary of Cancer Terms

Caption: Anatomy of the extrahepatic bile ducts. Extrahepatic bile ducts are small tubes that carry bile outside of the liver. They are made up of the common hepatic duct (hilum region) and the common bile duct (distal region). Bile is made in the liver and flows through the common hepatic duct and the cystic duct to the gallbladder, where it is stored. Bile is released from the gallbladder when food is being digested.