대한대장항문학회

Purpose : The aim of this study was to investigate the association of colorectal polyps with<br>carcinoma of the colon and rectum. Methods : Between January 1995 and December 1998, 203<br>consecutive patients with 423 colorectal polyps retrospectively documented at the Department<br>of General Surgery and College of Medicine in Dongguk University. Results : The peak age<br>group of the colorectal polyp was in the fifth decades (33.5%). The proportions of malignant<br>polyps were as follows: for size, 5.2% of polyps less than 1.0 cm and 19.5% of polyps larger<br>than 1 cm (P＜0.05); for morphology, 2.6% in polyps of Yamada type I, II and 18.5% in polyps<br>of Yamada type III, IV (P＜0.05); for location, 13.4% of the polyps located in rectum and<br>sigmoid colon and 7.6% of the polyps located in descending to ascending colon (P＞0.05); for<br>number of polyp, 4.5% in cases of single polyp and 25.0% in cases of multiple polyps (P＜<br>0.05); for underlying histology, 9.2% in cases of tubular adenoma and 19.2% in cases of<br>villous adenoma (p＜0.05). The presence of distal adenomatous polyp was increased the risk<br>of presence of the proximal adenomas (59.7%), whereas the presence of hyperplastic polyp did<br>not (16.7%). Conclusions : The malignant potential of colorectal polyps are correlated with<br>size, histologic type, morphologic shape, multiplicity and distal location. The presence of<br>hyperpalstic polyp should not be indication for colonoscopy because they are not associated<br>with proximal adenoma when adjusting for patient characteristics and presence of distal<br>adenoma.<br>