The two types of extrahepatic bile duct cancer are perihilar bile duct cancer and distal bile duct cancer:Perihilar bile duct cancer : This type of cancer is found in the area where the right and left bile ducts exit the liver and join to form the common hepatic duct. 
There two types of extrahepatic bile duct cancer: Perihilar and distal bile duct cancer. Perihilar bile duct cancer is found where the right and left bile ducts exit the liver and join to form the common hepatic duct.