Ulcerative colitis

• continuous, circumferential mucosal inflammation

• diffuse erythema, edema, friability

• disappearance of vascular pattern, grayish exudates, erosions, or shallow ulcers

• rectal involvement

Lesion: Ulcerative colitis. Diffuse inflammation is typical for ulcerative colitis: erythema, exudates, loss of vascular pattern.

UC

Lesion: Rare case of “cecal patch” in a child with left -sided ulcerative colitis.

Lesion: Cecal patch

Montreal and Paris classification for pediatric ulcerative colitis

UCEIS for assessment of UC activity

Vascular pattern (1 – 3): (A) 1, (B) 2, and (C) 3; Bleeding (1 – 4): (D) 1, (E) 2, (F) 3, and (G) 4; Erosions and ulcerations (1 – 4): (H) 1, (I) 2, (J) 3, and (K) 4.

Four grades:

• remission (0–1);

• mild (2–4);

• moderate (5–6);

• severe (7–8).