bile duct cancer (bile dukt KAN-ser)
Cancer that forms in a bile duct. A bile duct is a tube that carries bile (fluid made by the liver that helps digest fat) between the liver and gallbladder and the intestine. Bile ducts include the common hepatic, cystic, and common bile ducts. Bile duct cancer may be found inside the liver (intrahepatic) or outside the liver (extrahepatic).