Enhanced-magnification Endoscopy with Acetic Acid Kyosuke Tanaka 1 , Hideki Toyoda 1 , Yasuhiko Hamada 2 , Masaki Katsurahara 2 , Masatoshi Aoki 2 , Misaki Nakamura 2 , Ryo Kosaka 2 , Tomohiro Noda 2 , Katuhito Ninomiya 2 , Hiroyuki Inoue 2 , Ichiro Imoto 1 , Yoshiyuki Takei 2 1Department of Endoscopic Medicine, Mie University School of Medicine, Tsu, Japan 2Department of Gastroenterology, Mie University School of Medicine, Tsu, Japan Keyword: 酢酸法 , 拡大内視鏡 , 表面パターン分類 , enhanced-magnification endoscopy , acetic acid pp.891-897
Published Date 2007/4/26
DOI https://doi.org/10.11477/mf.1403101104
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 Technique of enhanced-magnification endoscopy with acetic acid instillation is very simple. With1.5% acetic acid, the surface of the mucosa becomes white and the fine surface pattern is able to be observed in detail. This technique is used for not only Barrett's esophagus but also for stomach, duodenum and colon. We classify the surface pattern of the Barrett's esophagus and the gastric mucosa into the following five types. Type I : small round pits of uniform size and shape. Type II : slit like pit. Type III : gyrus and villous pattern. Type IV : irregular arrangement of type I~III. Type V : destructive pattern of type I~III. It may be possible to diagnose early cancers using this classification even before biopsy. It is useful for demarcation line diagnosis, too. Furthermore, the surface pattern is observed more clearly by adding the use of the NBI system. Enhanced-magnification endoscopy with acetic acid instillation is a technique that should affract careful attention.

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