[Calculous stenosis of the duodenum. Five observations (author's transl)].

Five observations of calculous stenosis of the duodenum after cholecysto-duodenal fistulization are reported. Four times, the pre-operative diagnosis has been made out by an opaque gastro-duodenal transit. The treatment is usually surgical, and its modalities are discussed about, but it is pointed out that the endoscopic duodenal desobstruction on patients running high operative risks presents a real interest.