Santosh Kesari, MD, PhD, of Pacific Neuroscience Institute is the principal investigator for more than a dozen clinical trials, of which 8 are brain tumor-related. Dr. Kesari is Director of Neuro-oncology at PNI, and Chair and Professor of the Department of Translational Neurosciences at Saint John’s Cancer Institute. He is ranked among the top 1 percent of neuro-oncologists and neurologists in the nation, according to Castle Connolly Medical Ltd, and is an internationally recognized scientist and clinician.