Congenital Anomalies of the Kidney in Association with Wilms's Tumor

The association of Wilms's tumor with congenital anomalies of the upper genitourinary tract in a series of 116 children has been presented. The importance of pathological changes in an anomalous kidney after removal of the other kidney has been discussed. All children having nephrectomy for Wilms's tumor should be closely followed in order that symptomatic congenital lesions of the remaining upper urinary tract will be noted early enough to avoid irreparable damage.