Scoring system according to Gomes et al60
| Six biopsy specimens are assessed; each is graded on the scale of 0–4; the total score is achieved by adding the individual scores of the six biopsy specimens (maximum = 24). | |
| Grade 0 | Normal |
| Grade 1 | Mild oedema; inflammation in the lamina propria |
| Grade 2 | Crypt abscess formation; inflammation in lamina propria |
| Grade 3 | More severe inflammation with destructive crypt abscesses plus or minus granulomata |
| Grade 4 | More severe inflammation with active ulceration |