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Novel Endoscopic Ultrasonography Classification for Predicting Negative Vertical Margin in Colorectal Endoscopic Submucosal Dissection Specimens Yuki Kamigaichi 1 , Yudai Takehara 2 , Shin Morimoto 2 , Fumiaki Tanino 2 , Noriko Yamamoto 2 , Hirosato Tamari 2 , Yasutsugu Shimohara 2 , Hidenori Tanaka 1 , Ken Yamashita 1 , Shiro Oka 2 , Koji Arihiro 3 , Shinji Tanaka 1 1Department of Endoscopy, Hiroshima University Hospital, Hiroshima, Japan 2Department of Gastroenterology and Metabolism, Hiroshima University Hospital, Hiroshima, Japan 3Department of Anatomical Pathology, Hiroshima University Hospital, Hiroshima, Japan Keyword: 大腸腫瘍 , NBI , JNET分類 , EUS , vertical margin pp.1265-1273
Published Date 2022/9/25
DOI https://doi.org/10.11477/mf.1403202999
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 The Japanese Society for Cancer of the Colon and Rectum(the 9th edition)states that “the risk of local recurrence might be low in cases of endoscopically resected pT1 colorectal carcinoma with a tumor VM(vertical margin)≥500μm”, and an endoscopic resection for T1 cancer required a sufficient VM. Conversely, as JNET(the Japan NBI Expert Team)classification Type 2B included the various invasion depth lesions from low-grade dysplasia to SM-d lesion, EUS(endoscopic ultrasonography)should be performed additionally, as necessary, in determining the indication for endoscopic treatment. In colorectal ESD(endoscopic submucosal dissection)cases with JNET Type 2B lesions, we defined the distance from the tumor invasive front to the muscle layer on EUS-TFD(EUS as tumor-free distance)and classified it into Type I(EUS-TFD ≥1mm)and Type II(EUS-TFD <1mm). The EUS-TFD classification(Type I)was a significant predictor of VM ≥500μm and could be a novel diagnostic indicator for predicting sufficient VM in the colorectal ESD specimen for JNET Type 2B lesions.


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

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