According to the scope of involving pathological changes , they are classified : diffuse type : when the disease involves intrahepatic and extrahepatic bile duct , the duct wall incrassation and duct cavity appear , resembling withered arborization .

按照病变累及的范围分类漫溢型：病变累及肝表里胆管，管壁增厚，管腔缩窄，呈枯树梢状。