A Clinicopatological Study on Transrectal Ultrasonographic Findings of Proliferating Lesions in Rectal Cancer Invasion.

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  • Katsuta K.
    Department of Surgery II, Tokyo Women's Medical University
  • Imai S.
    Department of Surgery II, Tokyo Women's Medical University
  • Kameoka S.
    Department of Surgery II, Tokyo Women's Medical University

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  • 経直腸超音波検査所見（ＴＲＵＳ）による腫よう先進部からみた直腸癌悪性度診断に関する研究

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Abstract

Trans Rectal Ultrasonography (TRUS) was performed on 81 patients with rectal cancer preoperatively, the TRUS findings were compared with pathological findings, and follow-up of these patients was done.<BR>These patients were divided into two groups from the TRUS findings of proliferating areas in rectal cancer invasion.<BR>The TRUS findings were similar to the pathological findings.<BR>These two groups were subdivided into superficial (m, sm, mp) and deep (a1, a2, ai ) groups.<BR>These were 37 cases that had a clearly-demarcated border from the normal tissue around the cancerous tissue, and there were 44 cases that had an unclearly-demarcated border.<BR>The frequency of lympth-node metastases and the patients' prognoses were not different between the superficial lesions with unclear borders and those with clear borders.<BR>However, the deep lesions with unclear borders showed significntly greater frequency of lymph-node metastses (83.8% vs 25.0%, p< 0.001) and the worse 52 prognoses (5-year survival rate is 28.0% vs 93.3%, p< 0.0059) than those with clear borders.<BR>It was conclude, that the TRUS findings of proliferating areas in rectal cancer invasion correlated with malignant potential of rectal cancer ; therefore, TRUS is clinically very useful in determinating the operative procedure.

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