[Adenocarcinoma of the small intestine. Endoscopic diagnosis (author's transl)].

Adenocarcinomas of the small intestine are among the rarest tumours of the digestive tract. Their prognosis, which is usually very bad, is due to late diagnosis. In a 54 year-old-man, formerly tuberculous, the first sign was abdominal pain without any specific character. The diagnosis was confirmed by jejunal endoscopy, with biopsy under direct vision. The technique was made easier by the tumour developing on the first loop of small intestine, leading to a curative surgical operation.