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对５５例肝外胆管癌的影像学特证分析，病变位于肝外胆管上段２４例（４３．６４％）、中段１２例（２１．８２％）、下段１９例（３４；５４％）。４２例得到病理诊断，大体形态属浸润型、结节型、乳头型各为２４、６、１１例，组织学检查９７．６２％为腺癌。直接胆道造影的特征有狭窄型、阻塞型和息肉型。ＰＴＣ、Ｂ超、ＥＲＣＰ、ＣＴ的诊断准确率分别为９３．３３％、５８．１８％、７１．４３％、６６．６７％，以ＰＴＣ检查的准确率最高。黄疸病人应首选Ｂ超检查以了解胆管有无梗阻，扩张。一旦发现肝内胆管扩张，应作ＰＴＣ检查，并酌情选用ＥＲＣＰ、ＣＴ或选择性血管造影。
The special imaging analysis of 55 cases of extrahepatic cholangiocarcinoma was performed in 24 cases (43.64%) of the extrahepatic bile duct, 12 cases (21.82%) in the middle segment, and 19 cases (34; 54%) in the lower segment. Forty-two patients were pathologically diagnosed. The gross morphology was infiltrative, nodular, and papillary type were 24, 6, and 11 cases respectively. Histological examination was 97.62% for adenocarcinoma. Direct cholangiography features stenosis, obstruction, and polyposis. The diagnostic accuracy rates of PTC, B-ultrasound, ERCP, and CT were 93.33%, 58.18%, 71.43%, and 66.67%, respectively. The accuracy of PTC examination was the highest. Jaundice patients should be the first choice for B-ultrasound to check for bile duct obstruction and expansion. Once intrahepatic bile ducts are dilated, PTC examinations should be performed and ERCP, CT or selective angiography should be used as appropriate.