Dimitri Sigounas Dimitri Sigounas
Associate Professor of Neurological Surgery

Office Phone: 202-741-2750
Email: Email
Department: Neurological Surgery


  • Bachelor of Arts, Harvard University Faculty of Arts & Sciences, 2002
  • Doctor of Medicine (MD), University of North Carolina Chapel Hill- School of Medicine, 2008


Assistant Professor

Dimitri Sigounas, M.D. is a neurosurgeon and interventional neuroradiologist at The GW Medical Faculty Associates. He specializes in cerebrovascular disorders, including aneurysms, arteriovenous malformations (AVM's), vascular brain masses, carotid occlusive disease, and stroke. He has expertise in the endovascular and open treatment of aneurysms and the embolization of AVM’s. Dr. Sigounas is also skilled in carotid stenting/endarterectomy, stroke interventions, and delivery of intra-arterial chemotherapy. Additionally, he performs microvascular decompression for chronic pain syndromes and trigeminal neuralgia. He is one of the few neurosurgeons in Washington, D.C. with dual expertise in both open neurosurgical as well as minimally invasive interventional techniques for the treatment of neurologic disease, which affords him a unique perspective in determining the optimal treatment for each individual patient's needs using the most advanced technologies.

Dr. Sigounas graduated with an A.B. degree with honors from Harvard University. He subsequently received his M.D. from the University of North Carolina-Chapel Hill School of Medicine, where he was granted a Doris Duke Clinical Fellowship. Dr. Sigounas did his surgical internship and neurosurgical residency training, as well as serving as chief resident, at New York- Presbyterian Hospital/Weill Cornell Medical College and Memorial Sloan-Kettering Cancer Center. He completed specialized fellowship training in endovascular neurosurgery/interventional neuroradiology at New York-Presbyterian Hospital/Weill Cornell Medical College. He has surgical and interventional expertise in treating numerous vascular diseases of the brain and spine.

Dr. Sigounas has extensive clinical research experience in the area of minimally invasive neurosurgery and has published articles involving the treatment of aneurysms, dural arteriovenous fistulae, and brain tumors using the most innovative, least invasive approaches. He was one of the original contributors and co-authors of an ongoing NIH-funded, multi-center clinical trial assessing the efficacy of topical vancomycin on reducing surgical site infections in craniotomies. He has lectured both nationally and internationally.

Industry Relationships and Collaborations

This faculty member (or a member of their immediate family) has reported a financial interest with the health care related companies listed below. These relations have been reported to the University and, when appropriate, management plans are in place to address potential conflicts.

  • Metis Innovative, LLC