
Adding pertuzumab (Perjeta, Roche) to trastuzumab (Herceptin, Genentech) and docetaxel chemotherapy extended the lives (overall survival; OS) of people with previously untreated HER2-positive metastatic breast cancer by 15.7 months compared to Herceptin and chemotherapy (median OS: 56.5 vs. 40.8 months), according to data presented at the European Society for Medical Oncology 2014 congress in Madrid, Spain.