[Congenital anomalies of the urogenital tract in patients with a Wilm's tumor].

133 patients in whom a Wilms' tumour had been diagnosed between 1971 and 1986 were evaluated retrospectively for presence of congenital anomalies of the genitourinary tract. These were detected in 51 patients, 38.3%. A comparison was made between the incidence of each detected malformation in the patient group and in the general population. Some anomalies seemed to have a high association with the nephroblastoma; sharing the same basic embryological disorder is suggested as a possible explanation for this association.