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  • Title: Screening and surveillance colonoscopy in chronic Crohn's colitis: results of a surveillance program spanning 25 years.
    Author: Friedman S, Rubin PH, Bodian C, Harpaz N, Present DH.
    Journal: Clin Gastroenterol Hepatol; 2008 Sep; 6(9):993-8; quiz 953-4. PubMed ID: 18585966.
    Abstract:
    BACKGROUND & AIMS: Since 1980, we have followed 259 patients with chronic Crohn's colitis in a prospective colonoscopic surveillance program. Our initial results through August 1998 showed a 22% chance of developing definite dysplasia or cancer by the fourth surveillance examination. We now update the results of all examinations since September 1998 until April 2005. METHODS: All patients had at least 7 years of Crohn's colitis affecting at least one third of the colon. Patients were recalled every 1 to 2 years or sooner if dysplasia was found. Pathology was classified as normal, dysplasia (indefinite, low-grade [LGD], or high-grade [HGD]), or carcinoma. Lesions were classified as flat, polyp, or mass. RESULTS: A total of 1424 examinations were performed on 259 patients. Ninety percent had extensive colitis. The median age at diagnosis was 22 years (range, 2-61 y), and the median disease duration was 18 years (range, 7-49 y). On screening examination, definite dysplasia or cancer was found in 18 patients (7%). Thirteen had LGD, 2 had HGD, and 3 had cancer. On surveillance examinations, a first finding of definite dysplasia or cancer was found in an additional 30 patients (14%). Twenty-two had LGD, 4 had HGD, and 4 had cancer. The cumulative risk of detecting an initial finding of any definite dysplasia or cancer after a negative screening colonoscopy was 25% by the 10th surveillance examination. The cumulative risk of detecting an initial finding of flat HGD or cancer after a negative screening colonoscopy was 7% by the ninth surveillance examination. CONCLUSIONS: Periodic surveillance colonoscopy should be part of the routine management of chronic extensive Crohn's colitis.
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