Grade | Degree of the proximal convoluted tubule necrosis |
---|---|
0 | Normal histology |
1 | Mitoses and necrosis of individual cells |
2 | Necrosis of individual cells in adjacent proximal convoluted tubules, with survival of surrounding tubules |
3 | Necrosis confined to the distal third of the proximal convoluted tubule with a band of necrosis extending across the inner cortex |
4 | Necrosis affecting all three segments of the proximal convoluted tubule |