Endoscopic distinction between Crohn's and ulcerative colitis

Crohn's disease is usually referred to as Crohn's disease. The endoscopic differences between Crohn's disease and ulcerative colitis include the involvement of intestinal segments, the involvement of intestinal wall layers, and the different manifestations of lesions.

1. Crohn's

disease is more commonly involved in the ileocecal region and adjacent to the right colon, while ulcerative colitis mostly involves the rectum and sigmoid colon.

2. Crohn's disease

generally involves the whole layer of the intestinal wall, while ulcerative colitis lesions generally only involve the mucosa and submucosa.

3. Lesion manifestations

Crohn's disease under endoscopy are mostly longitudinal ulcers in the intestinal tract, with normal mucosa or pebble-like changes around the ulcer. The lesions are mostly segmental. Endoscopic examination of ulcerative colitis shows diffuse congestion and edema in the intestinal mucosa, while granular changes and increased fragility of the intestinal mucosa, and ulcer lesions are mostly continuous.