[Problems in congenital choledochus cysts].

Congenital choledochal cysts are classified into three types (type A = cystic dilatation, type B = diverticula, Type C = choledochocele). In addition, all cases of types A and B may have anomalies of the pancreaticobiliary duct system. In type I the pancreatic duct enters the common duct and in type II the common duct enters the pancreatic duct. These anomalies are considered etiological factors in the development of choledochal cysts and are important for prognosis and therapy. Types A and B should be mainly treated by choledochocystojejunostomy (Roux-en-Y), while in type C an endoscopic transpapillary splitting is recommended.