This is a non-randomized, open-label trial to evaluate 6 cycles of eribulin in female patients with invasive breast cancer who do not achieve pathologic complete response (pCR) after treatment with a standard neoadjuvant chemotherapy and surgery regimen. Patients will be randomized into three cohorts according to tumor-type: triple-negative (Cohort A), hormone-receptor-positive/HER2-negative (Cohort B), and HER2-positive (Cohort C) tumors. Patients will receive eribulin for 6 cycles (1 cycle = 21 days). Patients with HER2-positive tumors will also receive trastuzumab. Patients in all cohorts will be allowed to receive locoregional radiotherapy and/or adjuvant hormonal therapy per institutional guidelines.
The investigators propose to evaluate eribulin as adjuvant therapy in breast cancer patients who have residual invasive disease in breast or lymph node tissue following standard neoadjuvant chemotherapy and surgery regimen. Three cohorts of patients will be evaluated separately based on tumor type: triple-negative, hormone-receptor-positive/HER2-negative, and HER2-positive breast cancers.