Hepatoportal cholangiocarcinoma, i.e. tumors occurring in the bile ducts of the hepatoportal region, is a common malignancy of the biliary system. Usually, only radical resection of hilar cholangiocarcinoma has a chance of complete cure, and preoperative staging of the tumor is crucial. At present, the more frequently used staging is as follows: Bismuth-Corlette staging 1. Type I refers to the tumor located below the confluence of left and right hepatic ducts; 2. Among them, type I-III hilar cholangiocarcinoma all need surgery, the difference lies in the resection scope; type IV hilar cholangiocarcinoma is in principle difficult to be resected surgically, and liver transplantation can be tried if conditions allow. International cholangiocarcinoma tissue staging This is a relatively comprehensive assessment method for hilar cholangiocarcinoma, including: the extent of tumor invasion of bile duct (same as Bismuth-Corlette staging), tumor size, pathological type, extent of tumor invasion of hepatic artery and portal vein, lymph node metastasis, distant metastasis, pre-existing underlying liver diseases and the volume of liver remaining after presumed surgical resection etc. Physician’s note: Bismuth-Corlette staging has a clear localization of the primary tumor, but because it does not take into account the tumor invasion of portal vein, hepatic artery and lymph node metastasis and distant metastasis factors, and does not reflect the relationship between hilar cholangiocarcinoma and blood vessels, it has little significance in the assessment of preoperative resectable lines and usually cannot provide a basis for judging patient prognosis. Therefore, when staging patients preoperatively, international tissue staging of cholangiocarcinoma will also be referred to. This not only allows for a comprehensive resectability assessment of hilar cholangiocarcinoma, but also allows for prediction of patient prognosis by the pathological type of the tumor and the volume of the liver remaining after surgery.