Details of the histological scoring system
| Score | Surface ulceration |
| 10 | Present |
| 0 | Absent |
| Acute inflammatory infiltrate | |
| Lamina propria | |
| 0 | No polymorphs |
| 1 | Mild infiltrate |
| 2 | Moderate infiltrate |
| 3 | Severe infiltrate |
| Submucosa | |
| 0 | No polymorphs |
| 1 | Mild infiltrate |
| 2 | Moderate infiltrate |
| 3 | Severe infiltrate |