[Wilms' tumor in patients with different abnormalities].

We present three cases of patients with Wilms' tumour. The first case showed a bilateral tumour with hemihypertrophy and Beckwith-Wiedemann syndrome. The second one had hemihypertrophy and double left pyelocalyceal system with double renal tumour. The last case had a horse-shoe kidney with a tumour on the right and a left hydronephrosis. The second and third cases had a good evolution.