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The Significance of Tubuloserrated Adenoma Identified through the Analysis of Heterogeneous TSA Akiko Chino 1 , Hiroshi Kawachi 2 , Seiji Sakata 2 , Junki Tokura 1 , Keigo Suzuki 1 , Daisuke Ide 1 , Shoichi Saito 1 1Department of Gastroenterology, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo 2Department of Pathology, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo Keyword: heterogeneous traditional serrated adenoma , 混合型鋸歯状病変 , unclassified serrated adenoma , tubuloserrated adenoma , superficially serrated adenoma pp.219-227
Published Date 2025/2/25
DOI https://doi.org/10.11477/mf.053621800600020219
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 This study examines heterogeneous Traditional Serrated Adenoma(TSA), which exhibits varying proportions of different histological components. We conducted endoscopic, pathological, and molecular biological analyses to classify these heterogeneous TSAs into four subtypes. One subtype characterized by a mixture of tubular and serrated structures, along with KRAS/NRAS mutations, was designated as “tubuloserrated adenoma(TubSA)”. Similar to Superficially Serrated Adenoma(SuSA), TubSA may hold significance as either an associated or precursor lesion of TSA. While TubSA and SuSA share overlapping histological features, TubSA encompasses lesions that diverge from the histological criteria for SuSA, indicating a conceptual difference between the two. Further validation, including genomic analysis, is necessary to determine whether TubSA is redundant within the SuSA framework or represents a distinct category with its own implications.


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

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