胆道囊性扩张甚为少见,迄今见于文献者仅1000例,其中男性较多,日本人发病率最高。目前胆道囊性扩张可分为5型。1型:肝外胆道广泛性囊性扩张,呈梭状或小囊状。2型:总胆管、肝管及胆囊呈憩室状扩张。3型:单纯总胆管囊性扩张。4型:肝内胆管多发性 Bladder cystic dilatation is rare, so far found in the literature only 1000 cases, of which more men, the highest incidence of Japanese. Biliary cystic dilatation can be divided into 5 types. Type 1: Extrahepatic biliary extensive cystic dilatation, was fusiform or small cystic. Type 2: the common bile duct, hepatic duct and gallbladder diverticula dilatation. 3 type: pure bile duct cystic dilatation. Type 4: intrahepatic bile duct multiple