Description of the criteria of Rutgeerts et al for endoscopic recurrence9
| Score | Lesions |
|---|---|
| i0 | No lesions |
| i1 | <5 aphthous lesions |
| i2 | >5 aphthous lesions with normal mucosa between the lesions, or skip areas of larger lesions, or lesions confined to the ileocolonic anastomosis (that is, <1 cm in length) |
| i3 | Diffuse aphthous ileitis with diffusely inflamed mucosa |
| i4 | Diffuse inflammation with already larger ulcers, nodules, and/or narrowing |