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肝外胆管的肿瘤中乳头状肿瘤属于少见的类型。胆管内的乳头状肿瘤均有蒂，瘤体在胆管中有一定的移动性，因此临床表现与其他常见类型的胆管肿瘤有所不同，Ｂ超和ＣＴ等检查又难以发现确实的肿瘤影像，经内镜逆行性胰胆管造影（ＥＲＣＰ）和经皮经肝胆管造影术（ＰＴＣ）对作出
Papillary tumors in extrahepatic bile duct tumors are a rare type. The papillary tumors in the bile ducts all have pedicles, and the tumors have certain mobility in the bile duct. Therefore, the clinical manifestations are different from other common types of bile duct tumors. B-ultrasonography and CT examinations make it difficult to find a reliable tumor image. Endoscopic Retrograde Cholangiopancreatography (ERCP) and Percutaneous Transhepatic Cholangiography (PTC)