[New therapeutic possibilities in the diagnosis of congenital cystic bile duct dilatations (author's transl)].

The case of a 30-year-old woman with intra- and extrahepatic biliary dilatations (Caroli's disease) is reported. The features of the disease and its differential diagnosis are discussed. Special reference is given to the diagnostic approach by endoscopic retrograde cholangiography and to treatment with Chenodeoxy-cholicacid.