Table 3.
Histological grading criteria. [18]
| Parameters | Score | Histological features |
|---|---|---|
| Inflammation | 0 | None |
| 1 | Slight | |
| 2 | Moderate | |
| 3 | Severe | |
| Extent | 0 | None |
| 1 | Mucosa | |
| 2 | Mucosa and submucosa | |
| 3 | Transmural | |
| Regeneration | 0 | Complete regeneration or normal tissue |
| 1 | Almost complete regeneration | |
| 2 | Regeneration with crypt depletion | |
| 3 | Surface epithelium not intact | |
| 4 | No tissue repair | |
| Crypt damage | 0 | None |
| 1 | Basal 1/3 damage | |
| 2 | Basal 2/3 damage | |
| 3 | Only surface epithelium lost | |
| 4 | Entire crypt and epithelium lost | |
| Percent involvement | 1 | 1–25% |
| 2 | 26–50% | |
| 3 | 51–75% | |
| 4 | 76–100% | |