<prompt> Which of these statements abut ulcerative colitis US and colon carcinoma is FALSE ?The risk of carcinoma increases with duration of UCOverall risk is less than 5Cancer of rectum is more common than that of colonSurgery is indicated if biopsy shows severe epithelial dysplasia  <response>: Patients hospitalized for ulcerative colitis UC are at high risk for colectomy. The cumulative colectomy risk score ranged from 8, with significantly higher risk of colectomy in the high-risk stratum 13.7 compared to the intermediate-risk 4.2, P 0.001 and low-risk 1.3, P 0.001 strata Ref Davidson edition23rd pg 815 