病变是指原发于左右肝管汇合部至胆总管下端的肝外胆管恶性肿瘤。

Is the primary hepatic duct convergence around common bile duct to the bottom of the Department of malignant extrahepatic bile duct.

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胆管癌主要指源于肝外胆管的恶性肿瘤，此瘤具有独特的病理特征，预后不佳。

Cholangiocarcinoma is rare malignant tumors arising from the extrahepatic bile duct with unique pathologic features. The prognosis of the patients with cholangiocarcinoma is poor.

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