C3 and lupus nephritis: In terms of histopathology, all 3 (100%) C1q positive cases had diffuse proliferative GN, 18 (75.0%) C3 positive cases had lupus nephritis, 6 (66.7%) IgA positive cases were having diffuse proliferative GN, 29 (53.7%) IgM positive cases had FSGS while 114 (43.7%) FSGS and 65 (24.9%) MesPGN cases had negative IF findings.