perihilar bile duct

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.