CT diagnosis of rectal cancer - With special reference to the depth of invasion and the lymph node metastasis.

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  • 直腸がんのＣＴ診断　　特に壁深達度とリンパ節転移について
  • With Special Reference to the Depth of Invasion and the Lymph Node Metastasis
  • 特に壁深達度とリンパ節転移について

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Preoperative diagnosis of the depth of invasion and lymph node metastasis of rectal cancer were studied using the findings of computed tomography (CT).<BR>Of one hundred and four cases operated on for rectal cancer over a period of 32 months, thirty five cases were examined by CT with the use of olive oil enema and contrast enhancement using a 60% Conray drip infusion with reference to the histological findings.<BR>For direct invasion into the wall, the diagnoses by CT were coincident with microscopic findings in 75% of cancers of the rectosigmoid, in 75% of the upper rectum and in 84% of the lower rectum. Of all cases, 28(80%) were diagnosed correctly. As to local lymph node metastasis, 74% of all diagnoses by CT corresponded with the histological diagnosis. Moreover, seventeen cases were evaluated for lateral lymph node metastasis, and the diagnostic accuracy by CT was 88%.<BR>In conclusion, preoperative CT evaluation of the extension into the rectal wall and lymph node metastasis in rectal cancer was considesed useful

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