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Magnifying Endoscopy with Narrow-Band Imaging Fails to Diagnose the Extent of Undifferentiated Type of Early Gastric Cancer, Report of a Case Eiji Umegaki 1 , Yutarou Egashira 2 , Toshihisa Takeuchi 3 , Kazuhide Higuchi 3 , Takeshi Azuma 1 1Department of Gastroenterology, Kobe University Graduate School of Medicine, Kobe, Japan 2Department of Pathology, Osaka Medical College, Takatsuki, Japan 3Second Department of Internal Medicine, Osaka Medical College, Takatsuki, Japan Keyword: 未分化型胃癌 , NBI , 拡大観察 , 術前診断 , ESD pp.339-346
Published Date 2015/3/25
DOI https://doi.org/10.11477/mf.1403200175

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  • Abstract
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 An 80-year-old woman with an abnormality of the stomach underwent esophagogastroduodenoscopy, which revealed a depressed lesion on the anterior wall of the lower body of the stomach. Biopsy of the depressed lesion revealed an undifferentiated adenocarcinoma(signet ring cell carcinoma), and we thus diagnosed the patient with early gastric cancer type 0-IIc. Magnifying endoscopy with narrow-band imaging revealed the corkscrew pattern in the depression; however, we could not observe the remarkable changes in the microsurface/microvascular pattern in the surrounding mucosa. Microscopic examination of the resected specimen revealed that the tumor in the depressed lesion(IIc)consisted of undifferentiated adenocarcinoma(por, sig), which had invaded the submucosal layer with full-layer invasion of the mucosa. In the surrounding mucosa of the IIc lesion, undifferentiated adenocarcinoma had invaded the mid- to deep part of the mucosa with normal epithelium[gastric cancer 0-IIc+IIb, UL(−), sig, por2, pT1b2(SM2 : 1,000μm), ly1, v0, INFc, int, HM1, VM0].

 In undifferentiated type early gastric cancer, if the surface pattern is intact, the extent of cancerous infiltration in the mucosa cannot be identified using magnifying endoscopy. In such cases, biopsies of the surrounding mucosa should be performed.


Copyright © 2015, Igaku-Shoin Ltd. All rights reserved.

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

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