Stomach and Intestine(Tokyo) Volume 50, Issue 3 (March 2015)

The Effect of Different Magnification Levels on the Ability to Delineate Margins of Early Gastric Cancers Kunihisa Uchita 1 , Kenshi Yao 2 , Takehiro Iwasaki 1 , Koji Kojima 1 , Ai Kawada 1 , Mizu Nakayama 1 , Michiyo Okazaki 1 , Shinichi Iwamura 1 1Department of Gastroenterology, Kochi Red Cross Hospital Japan, Kochi, Japan 2Department of Endoscopy, Fukuoka University Chikushi Hospital Japan, Chikushino, Japan Keyword: 拡大内視鏡 , NBI , 早期胃癌 , 範囲診断 pp.301-310
Published Date 2015/3/25
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 To diagnose gastric cancers, microsurface and microvascular patterns are observed and characterized by magnifying endoscopy, but the magnifying ratio that magnifying endoscopy provides has not been determined. No published reports of the effect of different magnification levels on the ability to delineate margins of early gastric cancers are available. Maximal optical magnifying ratio is necessary to observe microvascular pattern in detail. In our study, the sensitivity of low power optical magnifying endoscopy with narrow band imaging(NBI)for delineation of gastric cancer margins was 92.9% and 95.0% for high power optical magnifying endoscopy with NBI. This study showed that the diagnostic ability of high power optical magnifying endoscopy is superior to low power optical magnifying endoscopy. We reported these cases and our experience in using the dual-focus scope.

 To diagnose early gastric cancer accurately, it is critical to apply magnifying endoscopy with maximal magnifying ratio.

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50巻3号 (2015年3月)
電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院