[The characteristics of the nephrotic syndrome in patients with renal amyloidosis].

68 cases of histologically confirmed renal amyloidosis associated clinically with the nephrotic syndrome (NS) were studied. The age of patients (over 40 years), mounting syndrome's manifestations in developing renal failure, absence of correlation between the quantity of amyloid deposits and completeness of the syndrome's picture were characteristic of the nephrotic syndrome in amyloidosis. NS in amyloidosis was most frequently the sign of extended process in kidneys and did not differ from other nephrotic syndromes by the disorders of lipid and protein metabolism. Direct correlation between nephrotic proteinuria and severity of tubulointerstitial lesions was found. 5-year survival from the onset of NS was 48%. Vital verification of NS caused by amyloidosis is complicated, nephrobiopsy being the most informative.