Javier Cortés, MD, PhD, Ramon y Cajal University Hospital, Madrid, Spain, discusses the KEYNOTE-355 study (NCT02819518) to determine the efficacy of pembrolizumab and chemotherapy versus chemotherapy alone in untreated, locally recurrent inoperable or metastatic triple-negative breast cancer. This interview was recorded via an online conference call with The Video Journal of Oncology (VJOncology).