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NBI Magnified Endoscopic Diagnosis of IIb Lateral Extension of Superficial Gastric Adenocarcinoma Tsuneo Oyama 1 , Akiko Takahashi 1 , Yoko Kitamura 1 , Akihisa Tomori 1 , Tomoaki Shinohara 1 , Kinichi Hotta 1 , Yoshinori Miyata 1 1Department of Gastroenterology, Saku Central Hospital, Saku, Japan Keyword: 胃癌 , NBI , 拡大内視鏡 , 進展範囲診断 pp.109-122
Published Date 2010/1/25
DOI https://doi.org/10.11477/mf.1403101839
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 458 well differentiated gastric adenocarcinoma that had been treated by en bloc ESD from May 2005 to April 2008 were used in this study, and the accuracy of the magnified endoscopic diagnosis of lateral extension by the NBI system was investigated. The overall accuracy was 97.4%, and the accuracy in the case of the lesions without IIb component was 100%(427/427). However, the accuracy in the case of the lesions with IIb component was 61%(19/31). All of the misdiagnosed cases had IIb component, and in total 19 areas were misdiagnosed.

 All of the misdiagnosed cases had villi like surface pattern, and the surrounding mucosal pattern was also villi like. The differential diagnosis between adenocarcinoma with villi like surface pattern and intestinal metaplasia is sometimes difficult, because sometimes IM shows irregular surface pattern.


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電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院

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