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本文对２５例先天性胆管囊状扩张症根据ＣＴ表现分为三种类型：①肝内型；②肝外型；③混合型。肝内型具有特征性ＣＴ表现为扩张呈囊状的胆管将门静脉分支包绕，在增强ＣＴ或胆道造影ＣＴ均可显示出＂中心圆点。征象。肝外型囊壁见突出腔内结节时为癌变征象。ＣＴ对本病的显示准确率达１００％。对照其它影像检查方法，作者认为：超声对本病也有重要诊断价值；Ｘ线胆道造影诊断价值不大；ＥＲＣＰ和ＰＴＣ为痛苦性检查方法，提倡不作首选。超声与ＣＴ结合检查，可相互取长补短，提高诊断水平，可取代ＥＲＣＰ和ＰＴＣ检查。
In this paper, 25 cases of congenital biliary cystic dilatation according to CT findings are divided into three types: ① intrahepatic; ② extrahepatic; ③ mixed. Intrahepatic type has a characteristic CT showed dilated cystic biliary branches of the portal vein surrounded by enhanced CT or cholangiography CT can show the “central dot.” Extrahepatic appearance of the wall to see the cavity nodules When the signs of cancer.CT on the accuracy of this disease showed 100% .Control other imaging methods, the authors believe that: ultrasound also has important diagnostic value of the disease; X-ray cholangiography is of little value in diagnosis; ERCP and PTC painful Check the method, advocate not to be the first choice.Ultrasound combined with CT examination, can complement each other, improve the diagnostic level, can replace ERCP and PTC examination.