title: Anal Crohn's disease with carcinoma in situ.
abstract: A 36-year-old female with a six-year history of Crohn's disease of the anus and colon was found to have in situ cloacogenic carcinoma of the anus after having undergone total proctocolectomy for massive bleeding. This case further supports the association between Crohn's disease of the gastrointestinal tract and its potential for malignant degeneration.
mesh_terms: D000328:Adult; D001003:Anal Canal / Q000473:pathology; D001004:Anus Diseases / Q000150:complications* / Q000473:pathology; D001005:Anus Neoplasms / Q000209:etiology* / Q000473:pathology; D002278:Carcinoma in Situ / Q000209:etiology* / Q000473:pathology; D002295:Carcinoma, Transitional Cell / Q000209:etiology* / Q000473:pathology; D003424:Crohn Disease / Q000150:complications* / Q000473:pathology; D005260:Female; D006801:Humans