Narrow band imaging, Polyp, Miss rate, Virtual chromoscopy"/> Narrow Band Imaging and White Light Colonoscopy for Detection of Polyps
Korean J Gastrointest Endosc > Volume 42(3); 2011 > Article
Korean Journal of Gastrointestinal Endoscopy 2011;42(3): 152-156.
협대역영상과 백색광원을 이용한 대장내시경의 용종 발견율
한석재ㆍ김은영ㆍ박재범ㆍ천종운ㆍ김가영ㆍ신영국ㆍ오장석ㆍ김병석ㆍ한지민ㆍ정진태ㆍ권중구ㆍ이창형ㆍ김호각
대구가톨릭대학교 의과대학 내과학교실
Narrow Band Imaging and White Light Colonoscopy for Detection of Polyps
Seok Jae Han, M.D., Eun Young Kim, M.D., Jae Bum Park, M.D., Jong Woon Cheon, M.D., Ka Young Kim, M.D., Young Kook Shin, M.D., Jang Seok Oh, M.D., Byung Seok Kim, M.D., Jimin Han, M.D., Jin Tae Jung, M.D., Joong Goo Kwon, M.D., Chang Hyeong Lee, M.D. and
Department of Internal Medicine, Catholic University of Daegu College of Medicine, Daegu, Korea
Abstract

Background/Aims:
Narrow band imaging (NBI) is a new technique that is expected to improve the detection rate of colorectal polyps, but results have been inconsistent. The aim of this study was to compare the polyp miss rate and the characteristics of missed colorectal polyps using white light (WL) and NBI.


Methods:
62 patients were randomized into two groups. In the first group (NBI first, NBIF), a colonoscopic examination of each segment (cecum-ascending, transverse, descending, and rectosigmoid colons) was performed first with NBI followed by a re-examination of the same segment using WL. An opposite sequence was applied for the other group (white light first, WLF).


Results:
67 polyps were found in the first examination, and 31 polyps were found on the re-examination, resulting in a polyp miss rate of 31.6%. The polyp miss rate was 39% for WLF and 23% for NBIF (p>0.05). Seventy-four small polyps (<5 mm) were found, and miss rates for NBIF and WLF were 20% and 46%, respectively (p=0.01). The polyp miss rate at the rectosigmoid was 11% for NBIF and 54% for WLF (p=0.01).


Conclusions:
The polyp miss rate was not significantly different between NBI or WL when a colonoscopy was performed. NBI resulted in a lower polyp miss rate for small (<5 mm) and rectosigmoid polyps than WL. (Korean J Gastrointest Endosc 2011;42:152-156)

Key Words: Narrow band imaging, Polyp, Miss rate, Virtual chromoscopy
주요어: 협대역, 용종, 간과율, 가상 색소내시경
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