NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,791 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

extrahepatic bile duct cancer
(EK-struh-heh-PA-tik bile dukt KAN-ser)
A rare cancer that forms in the bile ducts outside the liver. A bile duct is a tube that carries bile (fluid made by the liver) between the liver and gallbladder and the small intestine. Cancer that forms in the area where the right and left bile ducts meet outside the liver is called Klatskin tumor. It is the most common type of bile duct cancer.

EnlargeAnatomy of the extrahepatic bile duct; drawing shows the liver, right and left hepatic ducts, gallbladder, cystic duct, common hepatic duct (perihilar), common bile duct (distal), extrahepatic bile duct, small intestine, and pancreas. The inset shows the liver, bile ducts, gallbladder, pancreas, and small intestine.

Anatomy of the extrahepatic bile duct. The extrahepatic bile duct is made up of the common hepatic duct and the common bile duct. Bile is made in the liver and flows through the extrahepatic bile duct to the gallbladder where it is stored.