[Recto-sigmoid cancer and polyps in children. Comments apropos of 2 cases of atypical juvenile polyps].

The writers present a report of 2 observations of colo-rectal carcinoma, on a 19 month old infant with a mixed juvenile and adenomatous polyp situated at the recto-sigmoid junction and treated successfully by segmental colectomy, and on a 10 years old girl presenting a large colloid rectal carcinoma which occurred 6 years after resection of an atypical rectal juvenile polyp. After recalling the rarity and the gravity of colo-rectal carcinoma in childhood, the authors underline the importance of histological investigations in the juvenile polyposis which is usually benign; the possibility of histological aspects on separate polyps and sometimes on the same polyp explains the degeneration of some multiple juvenile polyps (several cases in the literature), or isolated polyp (first case described).