Dr. Cynthia Ma, Professor of Medicine, Division of Oncology at Washington University in St. Louis, is a physician scientist with research focus in breast cancer biomarkers and targeted therapeutics development. She has designed and conducted several mechanism-based early phase trials of novel agents in patients with resistant breast cancer. Her laboratory has focused on biomarkers and resistance mechanisms for agents that target cell cycle and PI3K pathway through analysis of clinical specimens and preclinical studies using breast cancer cell lines and patient-derived xenograft models. Dr. Ma received an MD from Beijing Medical University and holds a PhD in Development Biology from the University of Cincinnati.