2) Pathology
Crohn’s disease shows granuloma on biopsy and severe stricture on endoscopy.
Ulcerative colitis shows crypts abscesses on biopsy, but there is no stricture or granulomas.
Also, biopsies show a transmural lesion in Crohn’s disease. But, they show only mucosal and submucosal affection in ulcerative colitis.
