Crohn disease: Any area of gastrointestinal tract, focal distribution , luminal narrowing typical, segmental lesion , transmural involvement, cobblestone appearence , creeping mesenteric fat present, few pseudopolyps, ulcers are deep, fissures are seen, crypt abscess uncommon , Ulcerative Colitis: colon and rectum involved mainly, diffuse distribution , no skip lesion, rare luminal narrowing , mucosa and submucosa only involved, cobblestone appearence absent, superficial ulcers, creeping mesenteric fat absent, many pseudopolyps, fissures are absent, crypt abscess common,

Crohn disease and Ulcerative colitis

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