First-line Bevacizumab and Paclitaxel for HER2-negative Metastatic Breast Cancer: A French Retrospective Observational Study

Aim: To assess outcomes in patients treated with first-line bevacizumab-containing therapy for human epidermal growth factor receptor (HER) 2-negative metastatic breast cancer (mBC) at a single centre with a homogenous standard-of-care. Patients and Methods: Information on patient and disease characteristics, efficacy, and safety was extracted from computer-based records of all patients receiving first-line bevacizumabpaclitaxel at the Curie Institute, Paris, France, between 2008 and 2011. Results: Median progression-free survival in the 116 treated patients was 13.2 months; median overall survival was 38.4 months. Corresponding values were 9.0 and 18.8 months, respectively, in patients with triple-negative mBC, and 19.4 and 58.8 months, respectively, in patients receiving maintenance endocrine therapy. No new safety signals were seen. Conclusion: Outcomes in patients treated with bevacizumab-paclitaxel at our center were consistent with efficacy in prospective clinical trials, with notable activity in poor-prognosis disease. Maintenance endocrine or oral therapy with bevacizumab after paclitaxel discontinuation was associated with long-term disease control.