What are the types of gallbladder and bile duct cancer?
Most gallbladder and bile duct cancers are adenocarcinomas, which is a cancer that forms in the mucus glands of the gallbladder and bile ducts.
Most bile duct tumors form outside the liver (extrahepatic bile duct cancer), however, approximately one-third of bile duct tumors form inside the bile duct branches inside the liver (intrahepatic bile duct cancer). Bile duct tumors are also called cholangiocarcinomas.
There are several other forms of gallbladder cancer, but they are very rare. They include: