[Cystic dilatation of the bile ducts : value of various methods of diagnosis. Apropos of 3 cases].

Three cases of cystic dilatation of the biliary tract of 1st, 4th and 5th type are reported here according to the classification established by Longmire and Hadad amended. In two patients the diagnosis was carried out through ultrasound examination and confirmed, in one case, by intraveinous cholangiography associated to computed tomography (and by peroperatory cholangiogram in the other one). In the third patient suffering from Caroli's disease the diagnosis was carried out during peroperating cholangiography. The possibilities of the different methods in diagnosing cystic dilatations of the biliary tract are discussed and therapeutic problems are taken into consideration.