Phase II study of a novel neoadjuvant chemotherapy (NAC) for breast cancer (BC).

1060 Background: The goal of this NAC study was to improve the pathologic response of pts with localized BC. Methods: 51 pts with localized BC >1 cm were treated with this novel regimen consisting first of docetaxel 75 mg/m2, epirubicin 80 mg/m2, and cyclophosphamide 500 mg/m2 (TEC) and PEG Filgrastim for 4 cycles. Pretreament PET scan was done and repeated after course 1. Following the 4th course, ER+/HER2- patients received 4 additional TEC cycles if they achieved CR by MRI, or were switched to a non cross-resistant regimen (vinorelbine, bevacizumab, capecitabine) if they had < CR. HER2+ pts were given docetaxel + trastuzumab for 4 additional cycles, or were switched to a different regimen if < PR. MD Anderson residual cancer burden (MDARCB) score was used to measure pathologic response and correlation with several prognostic factors was studied. Results: Median age = 53; 27 were postmenopausal; 42 had invasive ductal carcinoma, 5 invasive lobular; 12 triple negative, 11 HER2+, and 28 ER+ or PR+/HER2-. ...