Epirubicin and Cyclophosphamide Followed by Docetaxel as Primary Systemic Chemotherapy in Locally Advanced Breast Cancer

Abstract

Background: The aim of this study was to evaluate the activity and toxicity of epirubicin and cyclophosphamide (EC) followed by docetaxel as primary systemic chemotherapy (PST) in locally advanced breast cancer. Patients and Methods: In this phase II trial, 46 patients with locally advanced breast cancer (T>3 cm or N>1) received epirubicin (90 mg/m²) and cyclophosphamide (600 mg/m²) every 3 weeks for four cycles, followed by docetaxel (70 mg/m²) every 3 weeks for four cycles. Primary endpoints were pathological and objective response in the breast and axilla, and toxicities. Results: The clinical response rate was 80.4% (95% confidence interval, 68.9-91.9%). Pathological response evaluation revealed 6 complete responses (CR: 13.0%). Patients with ER-negative tumors had a significantly higher rate of pathological CR than the others (33.3% vs. 3.2%; p=0.0105). Febrile neutropenia occurred in 4 patients (8.7%). Conclusion: EC followed by docetaxel is an active and well-tolerated treatment as PST for locally advanced breast cancer.