Figure 1: Histopathological findings in various disease categories. Bars, from left to right for each stage, represent patients with secondary (late) steroid resistance, primary (initial) steroid resistance, and congenital or infantile NS, respectively. C1q: Complement 1q nephropathy, FSGS: Focal segmental glomerulosclerosis, IgA: IgA nephropathy, IgM: IgM nephropathy, MCD: Minimal change disease; MesPGN: Mesangioproliferative glomerulonephritis, MPGN: Membranoproliferative glomerulonephritis