Pathologic Class |
Renal Morphology |
Class I |
Normal glomeruli: but immune deposits are noted by immunofluorescence and electron microscopy |
Class II |
Mesangial alterations only
a) No mesangial hypercellularity, but mesangial immune deposits are seen
b) Mesangial matrix and cellular hypertrophy with immune deposits |
Class III |
Focal, proliferative glomerulonephritis: <50% glomeruli affected. |
Class IV |
Diffuse glomerulonephritis: >50% glomeruli affected. Severe mesangial, endocapillary, or mesangio-capillary proliferation and/or extensive subendothelial deposits] |
Class V |
Membranous glomerulonephritis |
Class VI |
Advanced glomerulosclerisis |