[The investigation of the renal veins in the nephrotic syndrome in adults (author's transl)].

The problems in the radiological investigation of adults with the nephrotic syndrome are illustrated by three patients. In one it was due to spontaneous thrombosis of the cava, in the second there was renal vein thrombosis from self-administered overdose and the third patient had glomerulonephritis without renal vein thrombosis. In view of the therapeutic implications, radiological investigation of the renal veins is essential and should be carried out in every patient with the nephrotic syndrome.