9Hurlstonc DP, Sanders DS,Thomson M. Detection and treatment of early fiat and depressed colorectal cancer using high-magni fica-tion chromoseopic colonoseopy;a change in paradigm for western endos- copists? [ J ]. Dig Dis Sci ,2007,52 (6) : 1387 - 1393.
10Luehtefeld MA, Ross DS, Zander JD, et al. Late development of metachronous colorectal cancer. Dis Colon Rectum, 1987,30 ( 3 ) : 180 - 184.