Fellows Home / For Physicians Researchers / Departments / Department of Neurosurgery / People / Fellows Also in the section... People Show submenu Faculty Fellows Residents Clinical Research Publications Cerebrovascular & Skull Base Christopher Graffeo, MD Fellow Cerebrovascular and Skull Base Surgery Endovascular Surgical Neuroradiology Visish M. Srinivasan, MD Fellow Endovascular Surgical Neuroradiology Ethan Winkler, MD Fellow Endovascular Surgical Neuroradiology Spine Gene A. Katsevman, MD Fellow Spinal Neurosurgery