Practical Model to Optimize the Strategy of Adjuvant Postmastectomy Radiotherapy in T1-2N1 Breast Cancer With Modern Systemic Therapy.

For the high-risk group, the Kaplan–Meier survival analysis indicated that PMRT significantly improved 5-year rate of DFS from 81.4% to 91.9% ( p < 0.01, Figure 2D ), BCSS from 95.5% to 98.6% ( p = 0.05, Figure 2E ), and LRR from 5.6% to 1.4% with marginal significance ( p = 0.06, Figure 2F ).

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