I
histology normal, full house IF
II
mesangial deposits (in the centre, around the capillary loops)
III
Subendothelial deposits (outside glomerulus) < 50% of glomeruli
IV
Subendothelial deposits > 50% of glomeruli
V
supepithelial deposits, membranous spikes, embroded membrane, no inflammatory cells in capillaries
VI
Global glomeruloscleroris > 90% of glomeruli