Histopathologic features of ulcerative colitis and Crohn＇s disease

Abstract

Objective To retrospectively study histopathologic features of ulcerous colitis （UC） and Crotm＇s disease （CD） by endoscopic biopsy. Methods Data of age, gender and intestinal involvement of 106 cases of CD and 180 cases of UC confirmed by pathology were reviewed. Mucosal architecture, chronic inflammation, acute inflammation and epithelial features were evaluated based on histopathological criteria. These features were compared between the two groups. Results Compared with CD cases, UC showed significantly higher percentage of architectural disorders （ P 〈 0. 05 ）, lower percentage of discontinuous chronic inflammation （ P 〈 0. 05） and higher incidenee of cryptitis, crypt abscesses and polymorph cells in lamina propria （P 〈 0. 05 ）, and higher rate of epithelium damage, flattened and less mucous cell as well. Granuloma, pseudo pylorus glands metaplasia and narrow ulcer only occurred in CD cases. Lesions of 90% （162/180） cases of UC werc limited to colon, while those of 28% （30/106） of CD cases to ileoceeum, and those of 56% （59/106） CD cases involved different parts of gastrointestinal tract. Conclusion Diagnosis of CD and UC needs comprehensive analysis. Diagnostic evidence for CD includes focal involvement of ileocecure, the multifoeai involvement in gastrointestinal tract, granuloma, discontinuous inflammation, pylorie gland metaplasia, while that for UC includes mocosal damage limited to colon, continuous chronic inflammation, arehiteetural disorders, or epithelial damage. Key words: Colitis, ulcerative; Crohn＇s disease; Histopathologic diagnosis; Endoscopic biopsy