title: Anal carcinoma in inflammatory bowel disease.
abstract: We followed 9602 patients with Crohn's disease or ulcerative colitis for anal squamous cell carcinoma for up to 18 years. No significant increase was observed: two cases occurred vs 1.3 expected during 99,229 person-years of observation, (standardized incidence ratio = 1.6; 95 confidence interval: 0.2-5.7). Anal squamous cell carcinoma is rare even in inflammatory bowel disease.
authors.affiliation: Department of Epidemiology Research, Danish Epidemiology Science Centre, Statens Serum Institut, Copenhagen.
authors.forename: M
authors.initials: M
authors.lastname: Frisch
authors.forename: C
authors.initials: C
authors.lastname: Johansen
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001005:Anus Neoplasms / Q000453:epidemiology*; D002294:Carcinoma, Squamous Cell / Q000453:epidemiology*; D015331:Cohort Studies; D003093:Colitis, Ulcerative / Q000453:epidemiology; D003424:Crohn Disease / Q000453:epidemiology; D003718:Denmark / Q000453:epidemiology; D004198:Disease Susceptibility; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D015212:Inflammatory Bowel Diseases / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D016609:Neoplasms, Second Primary / Q000453:epidemiology; D012306:Risk; D002583:Uterine Cervical Neoplasms / Q000453:epidemiology