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鉴于累及肝管汇合处的肝门区胆管癌向肝内扩展和邻近主要血管结构，完整切除且切缘阴性不很容易。为了分析不能切除的原因，作者设计了一种手术前临床T分期系统。在Sloan－Kattering癌肿中心于1991～1997年收治的225例胆管癌中，90例属肝门区胆管爆，术前均经B超、经皮经肝胆管
Given that the hilar cholangiocarcinoma involving the confluence of hepatic ducts extends intrahepatically and is adjacent to major vascular structures, complete resection and negative margins are not easy. In order to analyze the cause of unresectable, the author designed a preoperative clinical T staging system. Of the 225 cases of cholangiocarcinoma treated in the Sloan-Kattering Cancer Center from 1991 to 1997, 90 cases were of the hilar bile duct, and all were preoperatively treated with B-ultrasound and percutaneous transhepatic bile ducts.