CTによる大腸癌T3とT4aの術前鑑別診断－CT colonography用画像データを用いた検討－

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  • 渡邉 祐亮
    埼玉医科大学　国際医療センター　画像診断科
  • 岡田 吉隆
    埼玉医科大学　国際医療センター　画像診断科

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  • Preoperative local staging of colorectal cancer using a CT: investigation of imaging data for CT colonography

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 Serosal invasion is one of the adverse prognostic factors of colorectal cancer, but it is difficult to evaluate the presence of serosal invasion accurately before surgery. This study was performed to explore the useful findings for evaluating the presence of serosal invasion using a CT. We retrospectively assessed 152 lesions of subserosal invasion and 19 lesions of serosal invasion. The presence of nodular advancing margin was the only significant factor predicting serosal invasion. The accuracy rate for diagnose serosal invasion was 84.2%. Results of this study demonstrated that a CT is useful in differentiating serosal invasion from subserosal invasion by using nodular advancing margin as a criterion.

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