Patients will be randomized in a 1:1 ratio to imetelstat + paclitaxel (with or without bevacizumab) versus paclitaxel (with or without bevacizumab) alone.
The purpose of this study is to evaluate the efficacy and safety of treatment with imetelstat + paclitaxel (with or without bevacizumab) versus paclitaxel (with or without bevacizumab) alone for patients with locally recurrent or metastatic breast cancer who have not received chemotherapy or have received one non-taxane based chemotherapy for metastatic breast cancer.