Primary IgA nephropathy in adults.

IgA nephropathy was found in 9.6% of 649 adults with primary glomerulonephritis. Hypertension was detected in 51.6% and renal failure in 32.3%. A nephrotic presentation was seen in 22.6% and recurrent macroscopic hematuria in 17.7%. On light microscopy, mesangial hypercellularity and an increase in mesangial matrix were frequently seen (74.2%). Immunofluorescence studies demonstrated IgA in all patients along with C3 in 61.3%, IgM in 27.4% and IgG in 11.3%. Followup was possible in 61.3% for mean period of 17.3 months. No clinical or biochemical abnormalities were detected on followup in 26.3%. Progression to end stage renal disease was noted in 7.9%.