Dimitrios Mathios, a brain tumor neurosurgeon from the Sidney Kimmel Cancer Center at Johns Hopkins University School of Medicine, has been named to the WashU Neurosurgery faculty as an assistant professor. His tenure begins in July 2023. He obtained his medical degree from the Kapodistrian University of Athens School of Medicine. He then had extensive post-doctoral training in brain tumor immunology in the labs of Michael Lim, MD, and Drew Pardoll, MD, PhD, at Johns Hopkins University School of Medicine. He also completed his residency training in neurosurgery at Johns Hopkins. During his residency, he became an expert in the development of liquid biopsy technologies for metastatic cancers and brain tumors in the lab of Victor Velculescu, MD, PhD. After residency, he completed a fellowship with Theodore Schwartz, MD, in neuro-oncology and skull base at the Weill Cornell Medicine Brain and Spine Center.