Extrahepatic bile duct tumors are tumors, both benign and malignant, that grow in the bile ducts located outside the liver. The details are as follows: 1. benign extrahepatic bile duct tumors: this kind of situation is relatively rare, and the incidence of the population is characterized by more females than males, among which papilloma is the most common, followed by adenoma and fibroma, and very few of them are lipoma, neurofibroma, smooth muscle tumors and misshapen tumors. 2. Malignant tumors of extrahepatic bile ducts: mainly cholangiocarcinoma, cholangiocarcinoma grows fast, the boundary is not clear, and the prognosis is poor. If there is a tumor in the extrahepatic bile duct, no matter it is benign or malignant, you should pay attention to it and go to the hospital in time to get a clear diagnosis, so as to avoid delaying the condition.