Postmastectomy Radiotherapy in pN1 Breast Cancer: Survival Outcomes and Prognostic Factors From a Single-Institution Cohort
In a retrospective single-institution study of 57 patients with pT1-2N1 breast cancer, postmastectomy radiotherapy (PMRT) was not associated with improved recurrence-free or overall survival, suggesting that outcomes are primarily driven by tumor biology, nodal burden, and systemic therapy rather than PMRT.