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Updated Treatment Strategies for pT1a-SM1 Barrett's Adenocarcinoma Kazuki Matsuyama 1 , Ryu Ishihara 1 , Yoshimi Tanaka 1 , Minoru Kato 1 , Shunsuke Yoshii 1 , Takashi Kanesaka 1 , Sachiko Yamamoto 1 , Koji Higashino 1 , Noriya Uedo 1 , Tomoki Michida 1 , Seiichiro Abe 2 , Tsuneo Oyama 3 1Department of Gastrointestinal Oncology, Osaka International Cancer Institute, Osaka, Japan 2Endoscopy Division, National Cancer Center Hospital, Tokyo 3Department of Endoscopy, Saku Central Hospital Advanced Center, Saku, Japan Keyword: Barrett食道腺癌 , pT1a-SM1 , 内視鏡切除 , 追加治療 , リンパ節転移 pp.1599-1608
Published Date 2025/11/25
DOI https://doi.org/10.11477/mf.053621800600111599
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 In Japan, pT1a-SM1 Barrett's adenocarcinoma(BAC)is defined as submucosal invasion within a depth of 500μm. Currently, no consensus exists regarding post-endoscopic treatment management for pT1a-SM1 BAC. The present study aimed to evaluate the treatment outcomes and metastasis risk of patients following endoscopic resection using data from previous multicenter studies as well as our institutional cohort. Among low-risk patients—defined as those with submucosal invasion depth of ≤500μm, without lymphovascular invasion and poorly differentiated components, and with tumor size of ≤30mm—no recurrence or metastasis was observed. Moreover, endoscopic treatment alone aided in long-term survival of low-risk patients. Contrarily, recurrence was observed in the high-risk group not meeting these criteria, suggesting the need for additional treatment modalities. Further accumulation of evidence and re-evaluation of treatment strategies are warranted, particularly for low-risk patients with pT1a-SM1 BAC.


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

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