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要旨●早期胃癌の質的診断におけるNBI/BLI非拡大内視鏡の有用性について検討を行った.自施設でNBI/BLI両者を用いて同日に観察した早期胃癌29病変を対象とし,非拡大観察において早期胃癌の質的診断に有用と考えられる腫瘍境界と粘膜不整の有無に関して,NBI/BLIによる視認性の向上を内視鏡医10名が評価した.腫瘍境界の有無:粘膜不整の有無で視認性が向上した病変は,NBI 69.0%:79.3%,BLI 86.2%:62.1%であり,早期胃癌における範囲診断および質的診断において,非拡大観察によるNBI/BLI内視鏡の有用性が示された.早期胃癌の内視鏡診断の際には,NBI/BLIを併用し,正確な範囲診断と質的診断を行うことが重要である.
This study aimed to evaluate the usefulness of NBI(narrow band imaging)/BLI(blue laser imaging)endoscopy in the diagnosis of early gastric cancers by comparing it with WLI(white light imaging). Results of endoscopic NBI, BLI, and WLI obtained from 29 patients with early gastric cancers were compared by 10 endoscopists in terms of the visibility improvement:“presence or absence of tumor border” and “presence or absence of mucosal surface irregularity” in nonmagnified observations. The lesions with improved visibility(“presence or absence of tumor border”/“presence or absence of mucosal surface irregularity”)were noted in 69.0%/79.3% by NBI and 86.2%/62.1% by BLI, respectively. Thus, in clinical practice, nonmagnified NBI/BLI in combination with WLI is useful in diagnosing early gastric cancers.
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