Dr. Christoph J. Griessenauer

Dr. Schirmer is board certified in neurological surgery and is fellowship trained in interventional neuroradiology and endovascular neurosurgery. He holds subspecialty certificates for neuroendovascular surgery and neurocritical care. His clinical interests include care and management of patients with acute ischemic and hemorrhagic stroke; intracranial aneurysms and arteriovenous malformations; carotid, vertebral and intracranial atherosclerosis and stenosis; and spinal vascular malformations. He specializes in endovascular flow diversion techniques, skull base surgeries and minimally invasive craniotomy techniques. He earned his medical degree at the Medizinische Fakultät at Ludwig-Maximilians-Universität München in Germany. Dr. Schirmer completed his residency and fellowships at Tufts University, New England Medical Center and Harvard Medical School Teaching Hospitals in Boston.|Video: more from Dr. Clemens Schirmer, M.D., PhD. Dr. Schirmer is rated as a Distinguished provider by MediFind in the treatment of Subarachnoid Hemorrhage. His top areas of expertise are Brain Aneurysm, Stroke, Subarachnoid Hemorrhage, Thrombectomy, and Stent Placement.

Dr. Hendrix is a neurosurgeon who specializes in cerebrovascular and endovascular neurosurgery. He is an assistant professor of neurosurgery in the Neuroscience Institute at Geisinger Commonwealth School of Medicine. He treats a variety of cerebrovascular pathologies including brain aneurysms, arteriovenous malformations, dural arteriovenous fistulas, cavernous malformations, trigeminal neuralgia, hemifacial spasm, carotid artery disease, moyamoya, intra- and extracranial steno-occlusive disease and spinal vascular disorders. Dr. Hendrix also cares for patients with degenerative spine disease as well as general neurosurgical disorders.|He attended Saarland University Faculty of Medicine in Germany, where he earned his medical degree and spent five years in the Department of Physiology conducting basic science research. In Germany, he is board-certified in neurosurgery and is an associate professor of neurosurgery at Saarland University. During his neurosurgery training, Dr. Hendrix completed several rotations at different U.S. neurosurgery departments. He has completed subspecialty training in cerebrovascular and endovascular neurosurgery at Geisinger Medical Center and Geisinger Wyoming Valley Medical Center.|As a clinician-researcher, Dr. Hendrix has significantly contributed to the medical literature. As first and senior author, he has published numerous articles in the field of cerebrovascular, endovascular and general neurosurgery. He acts as a peer-reviewer for several premier medical journals.|Dr. Hendrix speaks English and German. In his free time, he enjoys traveling, climbing, reading and playing chess. Dr. Hendrix is rated as an Advanced provider by MediFind in the treatment of Subarachnoid Hemorrhage. His top areas of expertise are Subarachnoid Hemorrhage, Stroke, Chronic Subdural Hematoma, Thrombectomy, and Embolectomy.

Hugh O'donnell is a Neurosurgery provider in Fountain Hill, Pennsylvania. Dr. O'donnell is rated as an Advanced provider by MediFind in the treatment of Subarachnoid Hemorrhage. His top areas of expertise are Stroke, Delirium, Subarachnoid Hemorrhage, and Chronic Subdural Hematoma.