Table 1 Grade of endoscopic recurrence.

Ileal and ileocolonic anastomotic lesions1
i0	No macroscopic lesions
i1	Less than 5 aphthous ulcers (<5 mm) in the neoterminal ileum
i2	More than 5 aphthous ulcers with normal mucosa between them, or ulceration(s) confined to the anastomosis
i3	Diffuse aphthous ileitis with a diffusely inflamed ileum
i4	Diffuse aphthous ileitis with larger ulcers, irregularity, and narrowing
Colonic lesions
c0	No macroscopic lesions
c1	Less than 5 aphthous or superficial ulcerations per segment* or frank erythema or oedema without ulceration
c2	More than 5 aphthous or superficial ulcerations on at least one colonic segment1
c3	Deep ulceration affecting less than 10% of the surface of the entire colon and less than 5 deep ulcerations in each colonic segment
c4	Deep ulcerations affecting more than 10% of the surface of the colon, or more than 5 deep ulcerations in a colonic segment, or presence of strictures.

*Caecum and ascending colon, transverse colon, descending and sigmoid colon, and rectum.