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Case of Superficially Serrated Adenoma(SuSA), Report of a Case Masakazu Akahonai 1 , Taku Harada 1 , Haruka Yorozu 1 , Yasuhiro Tachibana 1 , Hironori Aoki 1 , Tokuma Tanuma 1 , Toshiya Shinohara 2 , Shin Ichihara 3 1Center for Gastroenterology, Teine Keijinkai Hospital, Sapporo, Japan 2Department of Pathology, Teine Keijinkai Hospital, Sapporo, Japan 3Department of Pathology, Sapporo-Kosei General Hospital, Sapporo, Japan Keyword: SuSA , 鋸歯状構造 , 直腸病変 pp.951-959
Published Date 2020/6/25
DOI https://doi.org/10.11477/mf.1403202081
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 We report on a case of SuSA(superficially serrated adenoma). A man in his 60s was admitted to our hospital for a rectal lesion. Colonoscopy revealed a 20mm white, flat, elevated lesion in the rectosigmoid colon. Under magnifying endoscopy using crystal violet staining, the main flat elevated part showed a II pit pattern, and the central part showed a serrated type IV pit pattern. We histologically diagnosed SuSA, which consisted of straight adenomatous glands and showed serration in the superficial layer. Genetic analysis was performed, and the results were as follows:BRAF mutation negative, KRAS mutation positive, and TP53 negative, with low CIMP(CpG island methylator phenotype), unmethylated MLH1, and methylated SMOC1(secreted modular calcium-binding protein 1).


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

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