Scoring of histological changes following iodoacetamide treatment
| Score | Histological change(s) |
| 1 | Very mild inflammatory infiltrate |
| 2 | Mild inflammatory infiltrate with minute ulceration of the mucosa |
| 3 | Moderate inflammatory cell infiltrate with multiple small mucosal ulcerations involving the mucosa and submucosa |
| 4 | Extensive inflammatory cell infiltrate involving the mucosa and submucosa, with widespread ulceration. The inflammatory cell infiltrate also invades the muscularis propria |