Objective: Bile duct carcinoma is refers to the primary bile duct system in the epith-elial cells of the malignant tumor, the following liver cancer has become the second largestafter hepatic system tumor, the early symptoms are not obvious, clinical manifestations ofthe lack of specificity, surgical removal rate is low, the prognosis is poor. This articlethrough the retrospective study, summarize the extrahepatic bile duct carcinoma clinicalcharacteristics, knowledge of current, and the three sections of b...