Abstract
The detection rate of colorectal polyps was compared between f iberscopy and elec-tronic endoscopy. One thousand one hundred, eighty-two patients underwent total colono-scopy using fiberscope (FCSL50, Machida), and 193 of 1, 182 (16.3%) were found colorectal polyps (FCS group). On the other hand, 730 patients underwent total colonoscopy using electronic endoscope (TCE50L, Toshiba), and 199 of 730 (27.3%) were found colorectal polyps (TCE group). There was a significant difference in the detection rate of colorectal polyps between two groups (P <0.005). Three hundred twenty-four polyps in FCS group and 532 in TCE group were respectively detected. One more polyp was found per patient in TCE group than in FCS group on average. TCE group had a lower incidence of polyp at the sigmoid colon (35.5% vs. 45.7%) compared with FCS group, on the other hand, it was higher at the descending colon (13.2% vs. 10.2%) and transverse colon (18.0% vs. 10.2%). As to the number of polyps, the results showed a similar trend. The incidence of polyp concerning about size which was less than 10mm, especially 5mm in size (54.5% vs. 46.9%) was higher in TCE group. The number of polyps was much greater in TCE group. The incidence of polyp according to size at locations was apparently higher at rectum under 5mm in size in TCE group (73.5% vs. 58.7%), but there was no difference in other colon The number of polyp, under 10mm was greater at any location in TCE group. It was concluded that electronic endoscopy was more useful than fiberscopy on the detection of colorectal polyps.
