Bile duct cancers are also known as cholangiocarcinomas are a rare but aggressive type of cancer. Contact Cancer Surgery Clinic for bile duct cancer treatment in Mumbai. The bile ducts are a series of thin tubes that go from the liver to the small intestine. Bile duct cancer (cholangiocarcinoma) can start in any part of the bile duct system. If you have been diagnosed with bile duct cancer or are worried about it, you likely have a lot of questions.