Contemporary Analysis of Reexcision and Conversion to Mastectomy Rates and Associated Healthcare Costs for Women Undergoing Breast-Conserving Surgery.

9 , 10 , 21 The use of NAC was 13.5% in the Commercial cohort and 6.7% in the Medicare cohort reflecting an increasing trend in NAC utilization, consistent with prior studies. 44 – 46 We found that NAC was associated with a 29% decreased risk of reoperations in the Commercial cohort and a 35% decreased risk in the Medicare cohort.

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