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Clinicopathological and Endoscopic Characteristics of Mixed Type Gastric Signet-Ring Cell Carcinoma Yusuke Horiuchi 1 , Noriko Yamamoto 2 , Chika Fukuyama 1 , Hiroyuki Yamamoto 1 , Toshiyuki Yoshio 1 , Toshiaki Hirasawa 1 1Department of Gastroenterology, Cancer Institute Hospital of Japanese Foundation for Cancer Research 2Department of Pathology, Cancer Institute Hospital of Japanese Foundation for Cancer Research Keyword: 印環細胞癌 , 低分化腺癌 , ESD , NBI , 胃癌 pp.47-56
Published Date 2026/1/25
DOI https://doi.org/10.11477/mf.053621800610010047
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 Undifferentiated-type gastric cancer can be classified into signet-ring cell carcinoma(sig)and poorly differentiated adenocarcinoma(por). Meanwhile, in daily clinical practice, we occasionally encounter not only pure sig or pure por cases, but also mixed cases, containing both sig and por characteristics(mixed por cases).

 The present study showed that mixed por was an independent risk factor associated with eCura C-2 classification following endoscopic submucosal dissection(ESD). Additionally, magnifying endoscopy with narrow-band imaging(ME-NBI)detected mixed por cases in >80% of cases upon observing irregular vessels. Moreover, combining ME-NBI with biopsy increased the sensitivity for detecting mixed por cases to more than twice that of biopsy alone.

 In conclusion, when irregular vessels are observed, detailed examinations with ME-NBI is useful for identifying mixed por cases and in determining the appropriateness of ESD.


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

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