COLORECTAL DYSPLASIA AND CARCINOMA IN PATIENTS WITH ULCERATIVE-COLITIS AND PRIMARY SCLEROSING CHOLANGITIS

Background: The aim of this study was to evaluate the role of primary sclerosing cholangitis (PSC) as a cofactor in the dysplasia-carcinoma sequence in ulcerative colitis (UC). Methods: Forty-five patients with UC and concomitant PSC and 45 pair-matched control patients with UC o nly were examined for colorectal dysplasia and carcinoma. Results: The median duration of UC was 11 years in the group with UC and PSC and l j years in the control group. Thirteen of the 45 patients (29%) with U C and PSC had colorectal neoplasia: 4, carcinoma; 2, high-grade dyspla sia; and 7, low-grade dysplasia. Four of the 45 control patients (9%) had neoplastic findings: 1, carcinoma; 1, high-grade dysplasia, and 2, low-grade dysplasia (P < 0.05). Conclusion: The results suggest that the risk of colorectal dysplasia and carcinoma in patients with UC is increased by concomitant PSC.