Thomas Masaryk, MD

Thomas Masaryk, MD
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Department Diagnostic Radiology
Primary Location Cleveland Clinic Main Campus
Type of Doctor Adults Only
Languages English
Surgeon No
Locations Specialties & Treatments

Treatment & Services

  • Aneurysm Coiling
  • Aneurysm Embolization
  • Angiography
  • Angioplasty
  • Atherectomy
  • Cerebral Angiography
  • Computed Tomography (CT Scan)
  • Coronary Artery Atherectomy
  • Coronary Balloon Angioplasty (PTCA)
  • Embolization
  • Emobilization of Cerebral Aneurysms and AVMs
  • Endovascular Management of Cerebral Aneurysms
  • Endovascular Surgery
  • Intervention Section
  • Intracranial Angioplasty
  • Intracranial Stenting
  • Kyphoplasty
  • Lumbar Puncture (Spinal Tap)
  • Microsurgical Management of Cerebral Aneurysms
  • Neurological Surgery
  • Neurovascular Ultrasound
  • Nuclear Medicine SPECT Brain Scan
  • Percutaneous Treatments
  • Pre Operative Embolization Of Tumor
  • Preoperative Tumor Embolization
  • Rheolytic Thrombectomy
  • Sclerotherapy
  • Spinal Angiography
  • Stenting And Surgical Treatment OFC
  • Stents
  • Thrombectomy
  • Thrombolysis
  • Wada Test
View all 33 Treatment & Services +

Specialty in Diseases & Conditions

  • Acute Stroke
  • Aneurysm, Cerebral
  • Birth Defects
  • Blood Clots
  • Brain Aneurysms and Hemorrhage
  • Brain Hemorrhage
  • Carotid Artery Disease
  • Carotid Bruit
  • Carotid Cavernous Fistula
  • Cerebrovascular Disease
  • Cerebrovascular Occlusive Disease
  • Dural Arteriovenous Fistula
  • Extracranial Carotid Artery Aneurysms
  • Fistulas
  • Hemangiomas
  • Hemorrhagic Stroke
  • Intracranial Atherosclerosis
  • Intracranial Stenosis
  • Moya Moya Disease
  • Nosebleed
  • Pulmonary Embolism
  • Spinal AVM (arteriovenous malformation)
  • Spinal Cord Vascular Lesions
  • Spinal Cord Vascular Malformations
  • Spinal Dural Fistula
  • Spinal Fractures
  • Spinal Vascular Disorders
  • Spinal Vascular Malformation
  • Spine Tumors
  • Stroke
  • Tissue Plasminogen Activator (tPa) Deficiency
  • Transient Ischemic Attack (TIA)
  • Unruptured Cerebral Aneurysm
  • Vascular Malformations
  • Venous Malformations
  • Vertebral Compression Fracture
  • Vertebrobasilar Insufficiency
  • Von Hippel-Lindau Disease (VHL)
View all 38 Specialties +


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About Thomas Masaryk, MD

Thomas Masaryk, MD,served as Head of Neuroradiology at Cleveland Clinic from 1989 - 2008. He is also Professor of at the Lerner College of Medicine at Case Western Reserve University.

He is board-certified in diagnostic radiology with a certificate of added qualification (CAQ) in Neuroradiology and a career-long interest in cerebrovascular disease and stroke. He pioneered cerebrovascular imaging with magnetic resonance (MRA), optical coherence tomography, and most recently cone beam CT utilizing amorphous silicon, flat panel X-Ray detectors for diagnosis of acute subarachnoid hemorrhage.

Additionally he has more than twenty years of experience performing cerebrovascular therapeutic procedures, and he has been at the forefront of innovations in aneurysm coiling, avm embolization and the emergent treatment of acute stroke.


Dr. Masaryk  has been consistently named one of the country's top doctors by Woodall/ White since 1998. He has a joint appointment in the Cleveland Clinic’s Department of Neurosurgery, and he was named teacher of the year in 2001. The Cleveland Clinic’s neuroscience departments are consistently ranked within the top 10 in the nation in U.S. News & World Report magazine's survey of America’s top hospitals.

A frequent invited lecturer at national and international medical meetings, Dr. Masaryk has received grant support from the NIH, authored more than 150 scientific papers on cerebrovascular disease and has authored or contributed to 15 books. He is also a native of Northeastern Ohio.

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - Cleveland Clinic Foundation
Cleveland, OH USA

Fellowship - Cleveland Clinic Foundation
Cleveland, OH USA

Fellowship - Cleveland Clinic
Cleveland, OH USA

Residency - Cleveland Clinic Foundation
Diagnostic Radiology
Cleveland, OH USA

Residency - Cleveland Clinic Foundation
Diagnostic Radiology
Cleveland, OH USA

Medical Education - Medical College of Ohio
Toledo, OH USA

Undergraduate - The Ohio State University
Columbus, OH USA

Professional Highlights

  • Director, Neuroradiology Fellowship Program, Cleveland Clinic, 1989-1992
  • Endovascular Neurosurgery Training Program Director, 2002-Present
  • Radiology (Journal)  Editor's Recognition Award with Special Distinction, 1990-1993
  • Brain Aneurysm Foundation : Medical Advisory Board Member, February 2007
  • Cleveland Clinic Board of Governors,  2008


  • Radiology - Diagnostic Radiology
  • Radiology - Neuroradiology
  • Diagnostic Radiology

Specialty Interests

AVMs, brain aneurysm, carotid and intracranial angioplasty and stenting, carotid artery disease, carotid artery stenosis, carotid stenting, cerebral aneurysms, cerebrovascular disease, cerebrovascular disease including AVMs and intracranial aneurysms, dural AV fistulas, endovascular and microsurgical management of cerebral aneurysms, endovascular and microsurgical treatment of cerebral aneurysms and vascular malformations, endovascular treatment of stroke and intracranial occlusive disease, epistaxis, fistulas, hemorrhagic stroke, intracranial stenosis, ischemic stroke, neurovascular ultrasound, pre-operative tumor embolization, spinal AVM's, spinal cord vascular malformations, spinal vascular malformations, stenting and surgical treatment of carotid disease, stroke, treatment of spinal cord vascular lesions, vascular malformations, brain aneurysm/ vascular malformations, carotid stenting, cerebrovascular disease

Awards & Honors

  • Papal Audience, Pope John Paul II, St. Peter’s Basilica; Vatican City, February 1990
  • Selected to be included in the fourth listing of The Best Doctors in America, Woodward/White, Inc., 1998, 2002, 2004, 2005, 2006, 2007, 2008
  • Stage Physician, The Rolling Stones: No Security Tour, Gund Arena, Cleveland, Ohio, April 1, 1999
  • Teacher of the Year, Department of Neurosurgery, Cleveland Clinic, 2000-2001

Innovations & Patents

  • Dr. Masaryk has devoted his professional career to the study and treatment of cerebrovascular disease. He has received NIH funding for the development of magnetic resonance vascular imaging (MRA) and more recently, he has worked with optical coherence tomography, cone beam CT utilizing amorphous silicon and flat panel X-ray detectors for diagnosis of acute subarachnoid hemorrhage.


  • American College of Radiology
  • Radiological Society of North America
  • American Society of Neuroradiology
  • American Society of Interventional and Therapeutic Neuroradiology
  • Joint Section on Cerebrovascular Surgery of the American Association of Neurological Surgeons and Congress of Neurological Surgeons
Research & Publications

Research & Publications

See publications for Thomas Masaryk, MD.

(Disclaimer: This search is powered by PubMed, a service of the U.S. National Library of Medicine. PubMed is a third-party website with no affiliation with Cleveland Clinic.)

Industry Relationships

Industry Relationships

Cleveland Clinic physicians and scientists may collaborate with the pharmaceutical or medical device industries to help develop medical breakthroughs or provide medical expertise or education. Cleveland Clinic strives to make scientific advances that will benefit patient care and support outside relationships that promise public benefit. In order for the discoveries of Cleveland Clinic physicians' and scientists' laboratories and investigations to benefit the public, these discoveries must be commercialized in partnership with industry. As experts in their fields, Cleveland Clinic physicians and scientists are often sought after by industry to consult, provide expertise and education.

To assure professional and commercial integrity in such matters, Cleveland Clinic maintains a program that reviews these collaborations and, when appropriate, puts measures in place to minimize bias that may result from ties to industry. Cleveland Clinic publicly discloses the names of companies when (i) its physicians/scientists receive $5,000 or more per year (or, in rare cases, equity or stock options) for speaking and consulting, (ii) its physicians/scientists serve as a fiduciary, (iii) its physicians/scientists receive or have the right to receive royalties or (iv) its physicians/ scientists hold any equity interest for the physician's/scientist's role as inventor, discoverer, developer, founder or consultant.* In publicly disclosing this information, Cleveland Clinic tries to provide information as accurately as possible about its physicians' and scientists' connections with industry.

As of 9/26/2019, Dr. Masaryk has reported no financial relationship with industry that is applicable to this listing. In general, patients should feel free to contact their doctor about any of the relationships and how the relationships are overseen by Cleveland Clinic. To learn more about Cleveland Clinic's policies on collaborations with industry and innovation management, go to our Integrity in Innovation page.

Public Health Service-Reportable Financial Conflicts of Interest. Cleveland Clinic scientists and physicians engage in basic, translational and clinical research activities, working to solve health problems, enhance patient care and improve quality of life for patients. Interactions with industry are essential to bringing the researchers' discoveries to the public, but can present the potential for conflicts of interest related to their research activities. Click here to view a listing of instances where Cleveland Clinic has identified a Public Health Service (PHS)-Reportable Financial Conflict of Interest and has put measures in place to ensure that, to the extent possible, the design, conduct and reporting of the research is free from bias.

* Cleveland Clinic physicians and scientists subscribe to the guidance presented in the PhRMA Code on Interactions with Healthcare Professionals and the AdvaMed Code of Ethics on Interactions with Health Care Professionals. As such, gifts of substantial value are generally prohibited.

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