Aim: To characterize renal amyloidosis in patients with rheumatoid arthritis and stages of amyloid nephropathy.
Material And Methods: The trial covered 30 patients (6 males and 24 females) with documented rheumatoid arthritis (RA) complicated with secondary AA-amyloidosis. Amyloidosis diagnosis was confirmed in all the patients morphologically, the samples were studied with the peroxidase immunohistochemical method using specific monoclonal antibodies to SAA.