[An usual observation of Bouveret syndrome (author's transl)].

An unusual observation of Bouveret syndrome is reported. It occurred in a male patient, under the usual age for this disorder, with no history of cholelithiasis. Diagnosis was only established during the surgical procedure. There were neither radio-opaque stones nor air in the common biliary duct. Attempts to opacify the fistula failed. Gastro-entero-anastomosis, which is sometimes proposed because of the patient's poor general condition, is often necessary because of the local lesions. This procedure allows to wait until the local condition improves before undertaking the complete cure during the second procedure, with considerably lesser risk.