[Radiologic diagnosis of thrombosis of renal veins (author's transl)].

Recent literature shows thrombosis of renal veins to be more common than so far assumed. When it is suspected clinically, angiographic examination is essential since conventional and nuclear-medical examinations give only uncharacteristic results. Causes and clinical findings are outlined and two cases reported. The follow-up of the second case shows that in spite of progressive renal vein thrombosis renal function may be maintained if good collaterals develop.