Ureterosigmoidostomy and cancer of the colon. Report of a case.

A possible and quite frequent complication of uretero-sigmoidostomy can be the late development of a colic cancer at the site of the ureteric reimplantation. On the basis of the literature and of a personal observation, the accent is put on what can be done to discover the tumor in any early phase; the possibility that the increased risk of cancer should limit the colic urinary diversions for an exstrophy of the bladder is also discussed.