[Familial occurrence of hydronephrosis and of the mega-ureter -- megacystis syndrome (author's transl)].

The authors describe the familial occurrence of hydronephrosis, the father and two daughters being affected. In another family, mother and son suffered from the mega-ureter-megacystis syndrome. Cases described in the literature are reviewed. It is stressed that relatives of patients with congenital anomalies of the urinary tract should be carefull screened for possible renal abnormalities.