Panitumumab in combination with FEC 100 (5-fluorouracil, epidoxorubicin, cyclophosphamide) followed by docetaxel (T) in patients with operable, triple-negative breast cancer (TNBC): Preliminary results of a multicenter neoadjuvant pilot phase II study.

e11574 Background: Panitumumab is an antiboby targeting the epidermal growth factor receptor (EGFR) to which a role has been suggested in TNBC. Consequently, we evaluated the combination of a standard chemotherapy (FEC100 followed by T) with panitumumab as neoadjuvant therapy of operable TNBC. Methods: 58 patients with stage II-IIIA disease were prospectively included in this multicentre pilot study. Systemic therapy (ST) consisted of 4 cycles of FEC100 (500/100/500 mg/m2) q.3 weeks followed by 4 cycles of T (100 mg/m2) q.3 weeks, in combination with panitumumab (9mg/kg) for 8 cycles q.3 weeks. All patients underwent surgery at completion of ST. Complete pathologic response (pCR) was the primary endpoint (Sataloff : J Am Coll Surg 1995 ; Chevallier : Am J Clin Oncol 1993), with toxicity and biologic ancillary studies as secondary endpoints. Results: Patients characterisctics are as follows : mean age 50 [38-64] ; T2 : 81%, T3 : 19% (mean tumor size : 42 mm [25-80]) ; N0 : 73% and N1 : 27%; invasive ductal...