<prompt> Colonoscopy is are not indicated in -MEN 2BFAPHNPCCCornkite Canada syndrome  <response>: Ans. is a i.e., MEN 2B MEN 2B does not predispose to colon cancer. FAP, HNPCC, Cronkite Canada Syndrome predispose to Colon Cancer and hence screening with colonoscopy is needed. 