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Establishment of Endoscopic Diagnosis for Gastric Adenocarcinoma of Fundic Gland Type(Chief Cell Predominant Type)Using Magnifying Endoscopy with Narrow-Band Imaging Hiroya Ueyama 1 , Takashi Yao 2 , Kenshi Matsumoto 1 , Ippei Tanaka 1 , Hiroyuki Komori 1 , Yoichi Akazawa 1 , Yuta Nakagawa 1 , Tsutomu Takeda 1 , Kohei Matsumoto 1 , Sumio Watanabe 1 1Department of Gastroenterology, Juntendo University, School of Medicine, Tokyo 2Department of Human Pathology, Juntendo University Graduate School of Medicine, Tokyo Keyword: 胃癌 , 胃底腺 , pepsinogen I , H/K-ATPase , NBI , 拡大内視鏡 pp.1533-1547
Published Date 2015/11/25
DOI https://doi.org/10.11477/mf.1403200469
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 Gastric adenocarcinoma of fundic gland type(chief cell predominant type ; GA-FG-CCP)has recently been proposed as a new, rare variant of gastric adenocarcinoma. The aim of the current study was to evaluate the endoscopic diagnostic system of GA-FG-CCP using ME-NBI(magnifying endoscopy with narrow-band imaging). The endoscopic features of GA-FG-CCP were analyzed using CE(conventional endoscopy)and ME-NBI in 23 cases. The most common features observed with CE were as follows : 1)submucosal tumor shape, 2)whitish color, 3)dilated vessels with branching architecture, and 4)surrounding mucosa without atrophic changes. Endoscopic findings of GA-FG-CCP with ME-NBI could not meet the criteria for diagnosis of carcinoma. However, the four most frequent features detected using ME-NBI were as follows : 1)indistinct line of demarcation between the lesion and the surrounding mucosa, 2)dilatation of the crypt opening, 3)dilatation of the intervening portion between the crypts, and 4)microvessels without distinct irregularities. These findings appear due to the location of tumor origin and the congestion caused by pressure from the tumor. The endoscopic diagnosis of GA-FG-CCP can be established by recognizing these endoscopic features using both CE and ME-NBI. To elucidate the natural history of GA-FG-CCP by assessing the classification based on the macroscopic findings, grade of atypia, and cell differentiation, further investigations should include cases with these endoscopic features and an accurate pathological diagnosis of GA-FG-CCP.


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

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