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Does Preoperative MRI Reduce Positive Margins after Breast-Conserving Surgery?

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Preoperative magnetic resonance imaging (MRI) did not significantly reduce positive margins in breast-conserving surgery (BCS). Patient age and tumor size were the key factors influencing margin status in this study.

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Area of Science:

  • Oncology
  • Radiology
  • Surgical Oncology

Background:

  • Breast-conserving surgery (BCS) is a standard treatment for breast cancer, with negative margins being crucial for successful outcomes.
  • Preoperative magnetic resonance imaging (MRI) has been proposed as a tool to improve margin status in BCS.
  • This study investigated the association between preoperative MRI and positive margins in BCS.

Purpose of the Study:

  • To determine if preoperative MRI use is associated with a reduction in positive margins after breast-conserving surgery.
  • To identify factors influencing margin status in patients undergoing BCS.

Main Methods:

  • Analysis of data from the multicenter SHAVE/SHAVE2 trials involving patients with stage 0-3 breast cancer undergoing BCS.
  • Evaluation of margin status in relation to the use of preoperative MRI, with MRI use at the surgeon's discretion.
  • Multivariate analysis controlling for patient and tumor characteristics to assess the impact of preoperative MRI on margin status.

Main Results:

  • A total of 631 patients were included; 30.6% underwent preoperative MRI.
  • Patients with preoperative MRI showed a trend towards fewer positive margins (31.1% vs. 38.8%), but this was not statistically significant (p=0.073).
  • Multivariate analysis indicated that preoperative MRI was not a significant predictor of margin status; only patient age and tumor size were significant factors (p=0.032 and p=0.040, respectively).

Conclusions:

  • Preoperative MRI is not significantly associated with improved margin status in breast-conserving surgery.
  • Patient age and tumor size are the primary factors associated with margin status in BCS.
  • Further research may be needed to clarify the role of MRI in specific patient subgroups or surgical techniques.