Table 1 Grading criteria for each histologic change
Grade 0 | Grade 1 | Grade 2 | Grade 3 | |
|---|---|---|---|---|
CI | no | <3 lymphoid aggregates | > = 3 lymphoid aggregates | diffuse inflammatory cell infiltrate |
GS | no | <25% glomeruli sclerosed | 25–50% | >50% |
AS | no | both vessels wall thickening and luminal narrowing were slight | partial vessels luminal occlusion <= 50% | vessels luminal occlusion >50% |
NS | no | thickened tubular basement membranes and hyaline sclerosis surrounding the tubules when examined at 20X | the grade1 changes along with interstitial fibrosis could be observed at 4X | diffuse tubular atrophy and drop-out with extensive hyaline sclerosis observed at 4X |