Dr. Sun is an expert in both pediatric neurology and cerebrovascular neurology, with a special interest in pediatric and young adult stroke. She focuses on both acute care of stroke as well as longitudinal management of an array of neurologic conditions that affect children and young adults. Dr. Sun’s research focuses broadly on pediatric and young adult stroke, with emphasis on discovering the causes, treatments, and prevention of stroke in the young. More specifically, Dr. Sun is investigating novel monitoring and stroke prevention techniques in children with moyamoya disease, which is a rare disease that places affected children and young adults at high risk of stroke. The goal of Dr. Sun's research is to improve outcomes and quality of life of individuals affected by stroke and moyamoya disease. In addition to her clinical and research interests, Dr. Sun is the associate program director of the Child Neurology residency program at Johns Hopkins. After completing medical school at the Johns Hopkins University School of Medicine, Dr. Sun completed her pediatrics and neurology residency training at Johns Hopkins, and subsequently she completed a fellowship in Vascular Neurology/Stroke. Dr. Sun is rated as a Distinguished provider by MediFind in the treatment of Moyamoya Disease. Her top areas of expertise are Moyamoya Disease, Stroke, Stiff Person Syndrome, Thrombectomy, and Cerebral Artery Bypass Surgery.

Dr. Caplan specializes in the treatment of cerebrovascular disorders of the brain, head, neck and spine, such as aneurysms, arteriovenous malformations, arteriovenous fistulas, moyamoya disease, carotid artery stenosis and stroke. He is dual fellowship trained in both open cerebrovascular neurosurgery and endovascular neurosurgery, allowing him to offer patients the full spectrum of the latest surgical and endovascular techniques in treating these diseases. Dr. Caplan also focuses on treating acoustic neuromas and other tumors of the skull base, including meningiomas. Dr. Caplan graduated with honors from the Johns Hopkins University with a degree in neuroscience, where he spent time in the Hunterian Neurological Surgery Research Laboratory. He then earned his medical degree from Harvard Medical School. He completed his neurosurgery residency at Johns Hopkins, along with fellowships in cerebrovascular neurosurgery and endovascular neurosurgery, also at Johns Hopkins. He then completed an additional fellowship in endovascular neurosurgery at the University of Miami before returning to join the Johns Hopkins faculty. Dr. Caplan is rated as an Advanced provider by MediFind in the treatment of Moyamoya Disease. His top areas of expertise are Brain Aneurysm, Arteriovenous Malformation, Cerebral Arteriovenous Malformation, Thrombectomy, and Carotid Artery Surgery.

Dr. Elisabeth Marsh's clinical interest is in cerebrovascular neurology, and her clinical research focuses on stroke outcomes and recovery. Her clinical responsibilities include attending on the inpatient Stroke Service at the Johns Hopkins Hospital and inpatient Neurology Service at the Johns Hopkins Bayview Medical Center. In 2014, Dr. Marsh was named the Medical Director of the Comprehensive Stroke Program at the Johns Hopkins Bayview Medical Center. She implemented the Bayview Stroke Intervention Clinic (BaSIC), a multi-disciplinary follow-up clinic designed to promote patient follow-up, reduce hospital readmission rates, and enhance post-stroke recovery. Her current focus is on the under-reported neurologic deficits (particularly with respect to depression, fatigue, and cognition) that significantly impair long-term functional outcome and patient satisfaction, despite scores on metrics such as the NIH stroke scale that indicate a “good recovery”. She leads a team of vascular neurologists, emergency medicine physicians, neurosurgeons, interventional neuroradiologists, neurointensivists, and rehabilitation specialists, who work together to provide the highest level of care to all stroke patients, resulting in better functional outcomes and improved quality of life. She is also interested in the treatment of acute stroke and intracranial hemorrhage. Her past work has included evaluation of the predictors of hemorrhagic transformation following ischemic stroke. Using multivariable regression, she created a model that predicts rate of hemorrhagic transformation in patients with acute stroke on anticoagulation, the Hemorrhage Risk Stratification (HeRS) score. The tool is available for free through Apple by searching 'Johns Hopkins HeRS score' in the App Store. Dr. Marsh is rated as an Advanced provider by MediFind in the treatment of Moyamoya Disease. Her top areas of expertise are Stroke, Apoplexy, Transient Ischemic Attack (TIA), Thrombectomy, and Gastrostomy.

Bassel Shneker is a Neurologist in Columbia, Maryland. Dr. Shneker is rated as an Advanced provider by MediFind in the treatment of Moyamoya Disease. His top areas of expertise are Cervical Myelopathy, Hemangioblastoma, Dysembryoplastic Neuroepithelial Tumors (DNET), and Brain Stem Cancer.

Sunil Gupta is a primary care provider, practicing in Internal Medicine in Cumberland, Maryland. Dr. Gupta is rated as an Advanced provider by MediFind in the treatment of Moyamoya Disease. His top areas of expertise are Hypertension, Familial Hypertension, Glucocorticoid-Remediable Aldosteronism, Craniectomy, and Extracranial-Intracranial Bypass Surgery. Dr. Gupta is currently accepting new patients.

Reza Kanani is a Neurologist in Columbia, Maryland. Dr. Kanani is rated as an Advanced provider by MediFind in the treatment of Moyamoya Disease. His top areas of expertise are Cervical Myelopathy, Spinal Tumor, Brain Stem Cancer, and Dysembryoplastic Neuroepithelial Tumors (DNET).

Dr. Tamargo specializes in the treatment of aneurysms, arteriovenous malformations (AVMs), arteriovenous fistulas (AVFs), and cavernous malformations of the brain and spinal cord in both adults and children. Dr. Tamargo specializes in revascularization procedures for moyamoya disease. For this condition, Dr. Tamargo performs either a microsurgical encephaloduroarteriomyosynangiosis (EDAMS) or a microsurgical extracranial-to-intracranial artery bypass. Dr. Tamargo also specializes in the treatment of acoustic neuromas (vestibular schwannomas). A recipient of numerous honors and awards, some of Dr. Tamargo's most recent accolades include the Neurosurgery Faculty Teaching Award and the Hopkins Richard S. Ross Clinician Scientist Award. Dr. Tamargo is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. His top areas of expertise are Brain Aneurysm, Subarachnoid Hemorrhage, Acoustic Neuroma, and Schwannoma.

L. Fernando Gonzalez, M.D., is a cerebrovascular neurosurgeon trained in both open vascular surgery and minimally invasive endovascular approaches. He treats patients with vascular blockages, malformations and ruptures in the brain and spine, including aneurysms, strokes and arteriovenous malformations. He also specializes in delivering chemotherapy through the arteries of the brain for treatment of certain eye cancers, such as retinoblastomas — the most common eye cancer in children — and lacrimal gland carcinomas. Dr. Gonzalez sees patients at The Johns Hopkins Hospital and Johns Hopkins Bayview Medical Center. Dr. Gonzalez earned his medical degree from Pontificia Universidad Javeriana in Bogota, Colombia, where he also completed residency training in neurosurgery. He completed a neurosurgery research fellowship at Barrow Neurological Institute in Phoenix, Arizona, with a focus on skull base, vascular and microanatomy microsurgery. Dr. Gonzalez continued his training at Barrow by completing a second residency, during which he pursued additional fellowships in spine surgery, endovascular neurosurgery, and cerebrovascular and skull base surgery. Dr. Gonzalez is widely published in his field and actively pursues novel approaches to treatment. He invented an aspiration catheter with an attached guidewire, and a surgical retractor for minimally invasive brain surgery. He is also a co-inventor of a direct cerebral cooling device that allows clinicians to decrease cerebral temperature to protect the brain when needed after cardiac arrest, severe trauma or large strokes. Videos Meet Our Expert: L. Fernando Gonzalez, M.D.Cerebrovascular Neurosurgery. Dr. Gonzalez is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. His top areas of expertise are Brain Aneurysm, Subarachnoid Hemorrhage, Stroke, Stent Placement, and Transmyocardial Revascularization.

Dr. Vivek Srikar Yedavalli is currently an Associate Professor of Radiology and Radiological Science, Associate Professor of Neurology, the Director of Stroke, Neurovascular, and Perfusion Imaging at Johns Hopkins Hospital, Chief of Neuroradiology at Johns Hopkins Bayview Medical Center, and Assistant Director of the Department of Radiology Physician Scientist Incubator Program. Dr. Yedavalli has been recognized nationally as a translational stroke and perfusion imaging researcher and physician-scientist. Within one year of his appointment at Johns Hopkins, Dr. Yedavalli received the Radiological Society of North America (RSNA)’s Seed Grant using MRI spectroscopy for prognostication in subacute ischemic stroke. Dr. Yedavalli was then chosen as the inaugural recipient of the Johns Hopkins University Department of Radiology Physician Scientist Incubator Program (RAD-PSI), an internal grant that also confers funding and protected time for his stroke work. The following year, for applying his work on collateralization based on CT perfusion within acute ischemic stroke with artificial intelligence, Dr. Yedavalli was awarded the RSNA Scholar Grant. For his research endeavors, Dr. Yedavalli was previously chosen as the American Journal of Neuroradiology (AJNR) Editorial Fellow and then subsequently as a member of the Academy of Radiology and Biomedical Imaging Research’s Council of Early Career Investigators. Thereafter, for his novel translational applications of MRI perfusion techniques to stroke, Dr. Yedavalli was chosen as a Junior Fellow of the International Society of Magnetic Resonance Imaging in Medicine (ISMRM). Dr. Yedavalli became an Editorial Board member of Stroke and an Editor in Training for Stroke: Vascular and Interventional Neurology. For his research endeavors, Dr. Yedavalli was conferred the Junior Faculty Clinical Research Award in 2023. In addition to research, Dr. Yedavalli is an active member of a number of national committees with a strong interest in leadership. He is currently a member of the ASNR Research, Education, Social Media/Website, and Young Professionals Committees. He also served as the Co-Chair of the Social Media Committee for the ASFNR 2019. Previously, Dr. Yedavalli was an Illinois ACR RFS Delegate in 2017 and 2018. He will also be the ASNR’s AMA Representative at this upcoming meeting. Dr. Yedavalli’s interests additionally include educational and teaching endeavors. He was previously the recipient of the Department of Radiology Education Award during his residency training. He prefers a balanced teaching approach with trainees with focused learning while maintaining autonomy for a more productive learning environment. Dr. Yedavalli is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. His top areas of expertise are Arteriovenous Malformation, Moyamoya Disease, Brain Aneurysm, Thrombectomy, and Rhizotomy.

Jennifer Chu is a Neurologist in Columbia, Maryland. Dr. Chu is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. Her top areas of expertise are Cervical Myelopathy, Spinal Tumor, Hemangioblastoma, Dysembryoplastic Neuroepithelial Tumors (DNET), and Deep Brain Stimulation.

Alan R. Cohen is the director of pediatric neurosurgery at Johns Hopkins Children’s Center in Baltimore, Maryland, and one of the top pediatric neurosurgeons in the country. His area of specialty is treating infants and children diagnosed with brain tumors. Dr. Cohen’s goal is to get his patients back to being a kid again. He has a patient-centered approach to caring for each of his patients, working closely with the child’s family at every stage of the decision-making process. Dr. Cohen sees patients in the neurosciences clinic located in the Levi Watkins, Jr., M.D., Outpatient Center. As the Carson-Spiro Professor of Pediatric Neurosurgery, Dr. Cohen is a leader in developing minimally invasive techniques to enhance the safety and efficacy of selected pediatric neurosurgical procedures. He serves as director of the Minimally Invasive Neurosurgery Laboratory at Johns Hopkins and directs the Minimally Invasive Neurosurgery Fellowship Program. His lab focuses on developing novel instruments and surgical approaches. He has authored more than 200 peer-reviewed journal articles and book chapters, and published two textbooks. He has given approximately 330 national and international presentations, and has been an invited visiting professor at 50 medical centers. He is past president of the Society of Neurological Surgeons, the American Society of Pediatric Neurosurgeons and the AANS/CNS Section on Pediatric Neurological Surgery. He is past vice president of the American Academy of Neurological Surgery, a past director of the American Board of Neurological Surgery and current director of the American Board of Pediatric Neurological Surgery. Patient Reviews Hear what patients have to say about Dr. Cohen’s care: • Healthgrades Patient Reviews • Vitals Patient Reviews. Dr. Cohen is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. His top areas of expertise are Arachnoid Cysts, Meningocele, Hydrocephalus, Endoscopy, and Cerebral Artery Bypass Surgery.

Dr. Victor Urrutia serves as the medical director of the stroke service at The Johns Hopkins Hospital and director of the Sheikh Khalifa Stroke Institute. He focuses on the clinical aspects of cerebrovascular disease (stroke), specifically acute stroke therapy and prevention. Dr. Urrutia currently sees patients at the Stroke Prevention Clinic, located in the Johns Hopkins Outpatient Center in Baltimore on Wednesdays, and cares for patients in The Johns Hopkins Hospital's Brain Rescue Unit. Dr. Victor Urrutia received his medical degree from the University of Panama School of Medicine. He completed his neurology training at MCP Hahnemann University in Philadelphia, now Drexel University College of Medicine. After his residency training, he completed fellowship training in neurocritical care and acute stroke at Drexel University College of Medicine and became a faculty member in the neurocritical care and acute stroke division. He then returned to Panama for two years where he was the first to treat patients with IV thrombolytic therapy for acute stroke. Dr. Urrutia is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. His top areas of expertise are Stroke, Transient Ischemic Attack (TIA), Vertigo, Thrombectomy, and Gastrostomy.

Dr. Aylin Tekes is the Section Chief of Pediatric Neuroradiology at the Johns Hopkins Hospital, within the Department of Radiology and Radiological Science. Dr. Tekes primary expertise is in diagnostic pediatric neuroradiology encompassing all ages from fetus to young adolescents with particular interest in congenital anomalies, neonatal brain injury, brain tumors, seizure imaging. Utilization and application of advanced magnetic resonance imaging (MRI) techniques including diffusion-tensor (DTI), susceptibility-weighted imaging (SWI) as applied in hypoxic ischemic injury, brain injury in the premature brain, head trauma and ECMO well reflects in her publications. In addition to pediatric neuroimaging, Dr. Tekes is an expert in diagnosis and classification of soft tissue vascular anomalies and imaging of bladder exstrophy. Part of her research and daily activities involve QI processes, primarily targetted to reduce/eliminate radiation exposure in children when appropriate and improve workflow efficiency. She received her medical degree from Istanbul University and completed a residency in diagnostic radiology at Haydarpasa Research and Training Hospital in Istanbul, Turkey. She did clinical fellowships in Pediatric Radiology and Neuroradiology at The Johns Hopkins Hospital before joining faculty in 2008. Dr. Tekes is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. Her top areas of expertise are Exstrophy of the Bladder, Hydrocephalus, Skeletal-Extraskeletal Angiomatosis, Bladder Reconstruction, and Endovascular Embolization.

Dr. Jaishri Blakeley is the Marjorie Bloomberg Tiven Professor of Neurofibromatosis in Neurology, Oncology, and Neurosurgery at Johns Hopkins School of Medicine, director of the Johns Hopkins Comprehensive Neurofibromatosis Center and director of the Neurofibromatosis Therapeutic Acceleration Program (NTAP). She is an active clinician-scientist specializing in the care of people with NF1, NF2, LZTR1, SMARC1 schwannomatoses, and primary brain tumors. Her research expertise in the development of clinical trials for nervous system tumors and specifically, early clinical-translational studies including tumor pharmacokinetic and pharmacodynamic investigations, imaging biomarkers for rare nervous system tumors, and incorporation of patient-focused, functional endpoints into efficacy studies. She has been the national or international leader of 7 clinical trials focused on therapies for glioblastoma, NF1 and NF2. In 2012 she cofounded the NTAP to dramatically shift the landscape of NF1 via necessary, efficient, and expert discovery, translational and clinical research. NTAP focuses on therapeutics, fosters collaboration, facilitates open and timely sharing of results, and streamlines the research process to accelerate therapies for plexiform and cutaneous neurofibromas. Through NTAP, Dr. Blakeley has supported and collaborated with more than 80 laboratories and research teams across the globe enabling meaningful therapeutic development for NF1-associated neoplasms and supporting the development of an exceptional community of clinician scientists focused on NF1 via the Francis S. Collins Scholars Program in Neurofibromatosis Clinical and Translational Research. Her research and programmatic efforts are all in the service of improving outcomes for the patients with NF1, NF2, schwannomatosis, and primary brain cancer for whom she is honored to provide care. Dr. Blakeley is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. Her top areas of expertise are Neurofibromatosis, Schwannomatosis, Neurofibromatosis Type 2 (NF2), Neurofibromatosis Type 1 (NF1), and Laminectomy.

Dr. Felling is the director of the Johns Hopkins Pediatric Stroke Program and specializes in the evaluation and treatment of children with a wide range of cerebrovascular disorders. With combined training in child neurology and vascular neurology he offers expertise in both the acute diagnosis and treatment of stroke as well as longitudinal management of the neurological consequences of stroke in children. Dr. Felling earned both his M.D. and his Ph.D. in neuroscience at Penn State College of Medicine. He completed residency training in pediatrics at the Children’s Hospital of Philadelphia. He also completed residency training in pediatric neurology and a fellowship in vascular neurology at Johns Hopkins. Dr. Felling's goal is to improve the clinical care of patients through the development of efficient pathways for the rapid evaluation and treatment of children presenting with stroke. He is part of a multidisciplinary team of providers that care for children with cerebrovascular disorders. Clinical research efforts are aimed at improving neurological function in children following stroke and other brain injuries. Dr. Felling is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. His top areas of expertise are Stroke, Concussion, Delirium, Thrombectomy, and Endovascular Embolization.

Dr. Guryildirim is an Assistant Professor in Pediatric Radiology and Pediatric Neuroradiology. She earned her medical degree from Hacettepe University and went on to complete her radiology residency at the Gazi University School of Medicine. After residency, she completed a two-year-long fellowship in Neuroradiology at Rush University Medical Center where she was the chief fellow. She then completed a one-year-long fellowship in Advanced Imaging before joining the Rush University Medical Center Neuroradiology faculty. Dr. Guryildirim's research interests focus on functional brain imaging of epilepsy patients, hydrocephalus and headache. Dr. Guryildirim is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. Her top areas of expertise are Legius Syndrome, Headache, Moyamoya Disease, Posterior Fossa Decompression, and Endovascular Embolization.

Dr. Argye Hillis is a professor of Neurology, with joint faculty appointments in Physical Medicine and Rehabilitation and in Cognitive Science. She is also the Sheikh Khalifa Stroke Institute Professor of Acute Stroke Diagnoses and Management. Prior to medical training and neurology residency, Dr. Hillis worked as a speech-language pathologist, and conducted clinical research focusing on understanding and treating aphasia and hemispatial neglect. She has brought these areas of experience to impact on her clinical research in neurology, which involves cognitive and neuroimaging studies of aphasia and hemispatial neglect due to acute stroke and focal dementias. She has published extensively on these topics in journals and textbooks. Dr. Hillis is Associate Editor of Stroke and has served as Associate editor of Brain, Annals of Neurology, Aphasiology, American Journal of Speech-Language Pathology, Neurocase, Cognitive Neuropsychology, and Language and Cognitive Processes and served as co-Editor and Chief of Behavioral Neurology. Dr. Hillis serves as the Executive Vice Chair of the Department of Neurology and the Director of the Cerebrovascular Division of Neurology at Johns Hopkins. Dr. Hillis is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. Her top areas of expertise are Primary Progressive Aphasia, Stroke, Frontotemporal Dementia, Thrombectomy, and Gastrostomy.

Dr. Doris Da May Lin is an Associate Professor in the Johns Hopkins Medicine Department of Radiology and Radiological Science. She specializes in neuroradiology. Dr. Lin received her B.A. in chemistry from the University of Pennsylvania, and then pursued a joint M.D./Ph.D. degree at the Yale University School of Medicine, with graduate training in the neurosciences. She completed a medical internship at the University of Pennsylvania Hospital and a diagnostic radiology residency at New York Presbyterian Hospital-Cornell. After a two-year neuroradiology fellowship, she joined the faculty at Johns Hopkins. Dr. Lin is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. Her top areas of expertise are Parkes Weber Syndrome, Sturge-Weber Syndrome, Subdural Effusion, CACH Syndrome, and Endovascular Embolization.

Dr. Eric Jackson specializes in the evaluation and treatment of patients with a broad range of neurosurgical disorders, including congenital malformations of the brain and spine, hydrocephalus (including endoscopic treatment), chiari malformation, craniosynostosis, spinal dysraphism/tethered cord, brain and spinal cord tumors, and traumatic brain injuries. He is the Principal Investigator for several multi-institution research studies, including: Hydrocephalus Clinical Research Network: currently investigating endoscopic surgery vs shunting for the treatment of hydrocephalus in infants in a $10M randomized trial funded by the NIH Park Reeves Syringomyelia Research Consortium Advancing the treatment for pediatric craniopharyngioma, identifying biological targets for molecular therapy A multi-institutional trial investigating a non-invasive eye tracking device for assessing increased intracranial pressure. Dr. Jackson is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. His top areas of expertise are Hydrocephalus, Chiari Malformation, Chiari Malformation Type 2, Posterior Fossa Decompression, and Endoscopy.

Jonathan Johnson is a Neurologist in Columbia, Maryland. Dr. Johnson is rated as an Experienced provider by MediFind in the treatment of Moyamoya Disease. His top areas of expertise are Cervical Myelopathy, Hemangioblastoma, Spinal Tumor, and Subependymoma.