@article{f424d4b8a93440779b06d4e585b6dc2b,
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.",
keywords = "Adult, Aged, Aged, 80 and over, Anus Neoplasms/epidemiology, Carcinoma, Squamous Cell/epidemiology, Cohort Studies, Colitis, Ulcerative/epidemiology, Crohn Disease/epidemiology, Denmark/epidemiology, Disease Susceptibility, Female, Follow-Up Studies, Humans, Incidence, Inflammatory Bowel Diseases/epidemiology, Male, Middle Aged, Neoplasms, Second Primary/epidemiology, Risk, Uterine Cervical Neoplasms/epidemiology",
author = "M Frisch and C Johansen",
year = "2000",
month = jul,
doi = "10.1054/bjoc.2000.1153",
language = "English",
volume = "83",
pages = "89--90",
journal = "British Journal of Cancer",
issn = "0007-0920",
publisher = "Nature Publishing Group",
number = "1",
}