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Faculty - Neurosurgery at MedStar Georgetown

Amjad Nasr Anaizi, MDAmjad Nasr Anaizi, MD
Assistant Professor, Department of Neurosurgery

Dr. Anaizi received his degree in biomedical engineering at the University of Rochester. He then received a medical degree from Tufts University School of Medicine. He completed his neurosurgical training at Georgetown University where he did specialized training in minimally invasive spine surgery. Dr. Anaizi subsequently completed a complex and minimally invasive skull base surgery fellowship at the University of Cincinnati/ The Mayfield Clinic under the instruction of Dr. Theodosopoulos in 2013. Dr. Anaizi's interests include expanded endoscopic approaches to the skull base, supraorbital keyhole craniotomies, vestibular schwannomas, neuro-oncology, cerebrovascular surgery, radiosurgery, minimally invasive spinal decompressions and fusions.


Rocco Armonda, MDRocco Armonda, MD
Assistant Professor, Department of Neurosurgery

Dr. Armonda is focused on cerebrovascular and traumatic insults of the nervous system. His unique background includes cerebrovascular surgery, interventional neuroradiology and neurocritical care. He applied his skills to the care of combat casualties during his 27-year career in the U.S. military from which he has recently retired. He completed an undergraduate degree in chemistry in 1986 at the United States Military Academy at West Point. He graduated from the Uniformed Services University of the Health Sciences at Bethesda, MD in 1990, where he was inspired to pursue neurosurgery by Prof. Malcolm B. Carpenter, MD, his professor of neuroanatomy. He completed a seven-year neurosurgery residency at Walter Reed Army MEDCEN from 1990-1997 under the direction of LTC (ret) Richard G. Ellenbogen, MD. He then completed a two-year fellowship in Cerebrovascular Surgery, Interventional Neuroradiology and Neurocritical Care at Thomas Jefferson University under the tutelage of Dr. Robert H. Rosenwasser. His clinical focus remains on the most critical of neurosurgical patients with aneurysmal SAH, cerebrovascular ischemia/infarction, cerebral and spinal AVMs, and traumatic lesions of the brain. His interests also include the application of multi-modal monitoring of the brain, controlled hypothermia for cerebral protection, reconstructive post-traumatic craniofacial surgery, and traumatic neurovascular lesions of the brain and spinal cord.


Walter C. Jean, MDWalter C. Jean, MD
Professor and Program Director, Department of Neurosurgery
Director, Surgical Neuro-Oncology, Skull Base Neurosurgery

Dr. Jean received his medical degree from Cornell University, and completed his training at the University of Minnesota. Furthermore, Dr. Jean completed his training in skull base neurosurgery at the Mayfield Clinic in Cincinnati, under the tutelage of Dr. Harry van Loveren. In addition to serving as the director of resident education, Dr. Jean’s focus of interest is brain tumors, including immunotherapy for glioma, skull base meningiomas, acoustic neuromas and robotic radiosurgery.


Christopher G. Kalhorn, MDChristopher G. Kalhorn, MD
Associate Professor, Department of Neurosurgery
Director, Epilepsy & Functional Neurosurgery

Dr. Kalhorn received his medical degree from Loyola Stritch School of Medicine, completed his neurosurgical training at the Baylor College of Medicine under Dr. Robert Grossman, an internationally recognized expert in epilepsy and functional neurosurgery. Dr. Kalhorn’s focus of interest is functional neurosurgery, including surgical management of epilepsy and surgery for movement disorders such as essential tremor, Parkinson’s disease and dystonia.


R. Bryan Mason, MDR. Bryan Mason, MD
Assistant Professor, Department of Neurosurgery

Dr. Mason received his medical degree from Uniformed Services University of the Health Sciences. He completed Neurosurgical training at National Naval Medical Center and University of Maryland. Dr. Mason’s focus of interest is general neurosurgery including complex spine, lumbar and cervical fusion, cervical artificial disc replacement, brain tumors and pituitary disorders.


Kevin M. McGrail, MDKevin M. McGrail, MD
Professor and Chair, Department of Neurosurgery
Director, Cerebrovascular Neurosurgery

Dr. McGrail received his medical degree from Tufts University and completed his neurosurgical training at the Massachusetts General Hospital. In addition, Dr. McGrail completed a year fellowship of training in cerebrovascular neurosurgery at the Mayo Clinic under the direction of the late Dr. Thoralf M. Sundt. Dr. McGrail’s focus of interest is cerebrovascular disorders, including carotid artery disease, aneurysms and arteriovenous malformations.


Nathan Nair, MD Nathan Nair, MD
Assistant Professor, Department of Neurosurgery

Dr. Nair joins the Department of Neurosurgery after completing neurosurgery and orthopedics Surgery fellowship in complex spine at the University of Washington Medical Center. Board-eligible, Dr. Nair received his medical and public health degrees from Columbia University College of Physicians and Surgeons, NY. He then completed an internship and residency in neurosurgery, followed by a Gates Foundation-funded fellowship in health outcomes with a focus on functional health results at the University of Washington Medical Center, WA. Dr. Nair’s interests include spinal degenerative disease and spinal tumors; brain and pituitary tumors; traumatic brain and spine injury.


Vikram V. Nayar, MD Vikram V. Nayar, MD
Assistant Professor, Department of Neurosurgery

Dr. Nayar received his medical degree from the University of Maryland School of Medicine, and completed neurosurgical training at Baylor College of Medicine. He then completed a cerebrovascular and skull base surgery fellowship at Harvard Medical School and Brigham and Women’s Hospital, under the direction of Dr. Arthur Day. Dr. Nayar’s special interests include cerebrovascular disorders, skull base tumors, and spine surgery.


Faheem Sandhu, MD, PhD Faheem Sandhu, MD, PhD
Assistant Professor, Department of Neurosurgery

Dr. Sandhu received his medical degree from the University of Rochester School of Medicine. He completed neurosurgical training at Georgetown University. Dr. Sandhu completed a Complex and Minimally Invasive Spine fellowship with Dr. Richard Fessler in 2003 at The University of Chicago. Dr. Sandhu's focus of interest is minimally invasive discectomy and spinal decompression, minimally invasive spine infusions, endoscopic spinal and brain surgery along with kyphoplasty.


Jean-Marc Voyadzis, MDJean-Marc Voyadzis, MD
Assistant Professor, Department of Neurosurgery

Dr. Voyadzis received his medical degree from Georgetown University School of Medicine. He also completed his neurosurgical training at Georgetown University. Dr. Voyadzis completed a Complex and Minimally Invasive Spine fellowship in 2007 at The University of Chicago. Dr. Voyadzis' focus of interest is minimally invasive discectomy and spinal decompression and fusion, metastatic spine disease and spinal cord tumors, craniocervical disease, radiosurgery, and brain and pituitary tumors.



Affiliate faculty - Children’s National Medical Center

Robert Keating, MD - Program Director
  John Myseros, MD
Suresh Magge, MD