Table 1. Histological grades of disease activity and the corresponding histological features [19].
Grade | Disease Activity | Histological Features |
---|---|---|
0 | Inactive | No extravascular neutrophils |
1 | Mild | Neutrophils in the lamina propria |
2 | Moderate | Cryptitis/crypt abscesses |
3 | Severe | Erosions/ulcers |