The primary endpoint was the percentage of pathological complete remissions (pCRs), which was assessed locally at the time of surgery and defined as the absence of invasive tumor cells in the breast and axilla (pCR; ypT0/Tis, ypN0). Patients underwent breast-conserving or ablative surgery, and treatment of axillary lymph nodes included sentinel lymph node biopsy or axillary lymph node dissection.