Variations in the Diagnostics of Early Gastric Cancer Margins by Magnifying Endoscopy with Narrow-band Imaging(ME-NBI) Kunihisa Uchita 1 , Taku Takahashi 1 , Rikiya Daike 1 , Takehiro Iwasaki 1 , Kouji Kojima 1 , Ai Kawada 1 , Michiyo Okazaki 1 , Shinichi Iwamura 1 1Department of Gastroenterology, Kochi Red Cross Hospital, Kochi, Japan Keyword: 拡大内視鏡 , NBI , 胃癌 pp.1462-1470
Published Date 2018/10/25
DOI https://doi.org/10.11477/mf.1403201495
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 Multiple studies have reported the usefulness of magnifying endoscopy with narrow-band imaging(ME-NBI)over conventional endoscopy for diagnosing early gastric cancer margins.

 This study aimed to compare the diagnostic accuracy of the demarcation line of early gastric cancer using ME-NBI with conventional endoscopy. We enrolled 218 consecutive patients with early gastric cancer who underwent ME-NBI to determine the margins before ESD. While 65.1% cases could be delineated by conventional endoscopy, 17.0% cases couldn't be delineated even remicircle. implying the necessity of biopsy to detect the margins of those lesions just by conventional endoscopy. Conversely, 98.6% cases could be delineated by ME-NBI. From the perspective of the macroscopic type, in elevated and depressed lesions, it was easy to detect the margins by conventional endoscopy or ME-NBI. However, in flat lesions, the rates of definitive diagnosis of the margins of lesions using conventional endoscopy were only 10.6%, whereas 97.0% lesions were detected by ME-NBI. Hence, ME-NBI is necessary for determining the margins of early gastric cancer.

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