Utility of CT-RVS in Determining Extent of Resection in Breast-conserving Surgery

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  • 乳房温存手術での切除範囲決定におけるCT-RVSの有用性の検討
  • 臨床経験 乳房温存手術での切除範囲決定におけるCT-RVSの有用性の検討
  • リンショウ ケイケン チブサ オンゾン シュジュツ デ ノ セツジョ ハンイ ケッテイ ニ オケル CT-RVS ノ ユウヨウセイ ノ ケントウ

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Abstract

[Objectives]To measure the pathological margin-tumor distance in specimens resected from breast-conserving surgery, and to clarify the usefulness of computed tomography (CT)-real-time virtual sonography (RVS) in determining the extent of resection in mastectomies. [Subjects] This study included patients who underwent breast-conserving surgery before the introduction of RVS (US group, n=50) or after the introduction of RVS (RVS group, n=50). [Methods] A 2-cm margin was added to define the extent of resection from each lesion. [Results] Margin-tumor distance was 15.7±6.4 mm in the US group and 20.8±7.5 mm in the RVS group (p=0.0003). Positive margins were seen in 8 cases in the US group (16%) and 4 cases in the RVS group (8%). In both groups, lesions of positive margins were intraductal components or ductal carcinomas in situ that were difficult to identify. [Conclusion] Based on a mean margin error of -4.3±6.4 mm in the US group and 0.8±7.5 mm in the RVS group, RVS offered improved accuracy and a tendency toward fewer margin-positive cases, suggesting that CT-RVS is useful for determining the extent of resection in breast-conserving surgery.

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