Mark Chwajol MD

Assistant Professor
Photo of Mark Chwajol MD

Biographical Info


Cerebrovascular Surgery
University of Illinois at Chicago

Neurosurgery Chief Resident
Montefiore Medical Center
The University Hospital of Albert Einstein CoM, Bronx, NY

Neurosurgery Resident
Montefiore Medical Center
The University Hospital of Albert Einstein CoM, Bronx, NY

General Surgery
Montefiore Medical Center
The University Hospital of Albert Einstein CoM, Bronx, NY


Medical School:

State University of New York
Downstate College of Medicine; Brooklyn, NY


Board Eligible

Medical Licensure:



  • Assistant Professor, Department of Neurosurgery, University of Illinois at Chicago


  • Assistant Professor
    Department of Neurosurgery, University of Illinois at Chicago


  • University of Illinois Hospital and Health Sciences System


Clincial Interests

  • Neurosurgery of Aneurysms, Arteriovenous Malformations and Cavernomas
  • Cerebral Blood Flow Measurement
  • New techniques in EC-IC Bypass Surgery: Excimer Laser-Assisted Non-occlusive Anastomosis (ELANA)

Research Interests

  • Radiographic and Computer-Simulated Modalities in Cerebral Blood Flow Measurement and Indications for EC-IC Bypass Surgery



  • New York State Neurosurgical Society Resident Presentation Award (2007)


Selected Publications

  • Extracranial Aneurysms Of The Posterior Inferior Cerebellar Artery: A Novel Management Approach With Resection And Primary Re-Anastomosis. Report Of 3 Cases And Review Of The Literature. Markus Chwajol, M.D., Ziad Hage, M.D, Fady Charbel, M.D., Department of Neurosurgery, University of Illinois at Chicago, Chicago, Illinois, USA
    To be submitted for publication in Nov 2011. 
  • Extracranial Carotid – Vertebral Bypass for Endovascular Access to Complex Posterior Circulation Aneurysms: A Novel Management Approach, Markus Chwajol, M.D., Troy Munson, M.D., Ali Alaraj, MD, Fady Charbel, M.D., Victor A. Aletich, M.D., Sepideh Amin-Hanjani, M.D., Department of Neurosurgery, University of Illinois at Chicago, Chicago, Illinois, USA, Neurosurgery – accepted for publication in September 2011. 
  • Evaluation Of Indirect Decompression Of The Lumbar Spinal Canal Following Minimally Invasive Lateral Transpsoas Interbody Fusion: Radiographic And Outcome Analysis, Eric H. Elowitz M.D., Daniel S. Yanni M.D., Mark Chwajol M.D., Robert M. Starke M.D., Noel I. Perin M.D., FRCS, Department of Neurological Surgery, Weill-Cornell Medical College, New York-Presbyterian Hospital, New York, New York, Department of Neurosurgery, Roosevelt Medical Center, New York, New York
    Minimally Invasive Neurosurgery – accepted for publication in June 2011 
  • Occipital Artery To Posterior Inferior Cerebellar Artery Bypass For Treatment of Bilateral Vertebral Artery Occlusion: The Role of Quantitative Magnetic Resonance Angiography Non-invasive Optimal Vessel Analysis (NOVA). Case Report and Review of the Literature. Mark Chwajol, M.D., Robert M. Starke, M.D., Alejandro Berenstein, M.D., Daniel Lefton, M.D., Lauren Ostergren, B.S., Chandranath Sen, M.D., David J. Langer, M.D., Departments of Neurosurgery, Neuroendovascular Surgery and Neuroradiology, Roosevelt Hospital, N.Y., Neurosurgery 4 (64), April 2009: E779 – 781. 
  • Impact of Compensatory Hyperhidrosis on Patient Satisfaction After Endoscopic Thoracic Sympathectomy for Focal Primary Hyperhydrosis. Mark Chwajol, M.D., Ignacio J. Barrenechea, M.D., Shamik Chakraborty, Tomoyuki Ichiba, B.S., Jonathan B. Lesser, M.D., Clifford P. Connery, M.D., Noel I. Perin, M.D., FRCS(Ed), Departments of Neurological Surgery and Thoracic Surgery, Roosevelt and Beth Israel Hospital Ctrs, N.Y., Neurosurgery 3 (64), March 2009: 511 – 518. 
  • Antifibrinolytic Therapy To Prevent Early Rebleeding After Subarachnoid Hemorrhage., A Review. Mark Chwajol, Robert M. Starke, Grace H. Kim, Stephan A. Mayer, E. Sander Connolly Jr., Department of Neurosurgery, Albert Einstein CoM; Bronx, New York and Departments of Neurosurgery and Neurology, Columbia University, New York, Neurocritical Care 8 (3), June 2008: 418 – 426. 
  • Correlation of Anomalous Vascular And Osseous Anatomy In Congenital Kyphosis Type I. Case Report. Mark Chwajol, MD and John K. Houten MD, Department of Neurosurgery, Albert Einstein CoM of Yeshiva University; Bronx, New York, Journal of Neurosurgery Spine 3 (5), Sep 2006: 259 – 263.
Categories: Department of Neurosurgery


Research Faculty

Andreas A. Linninger, PhD
Department of Bioengineering

Meide Zhao, PhD
Department of Neurosurgery
Visiting Research Assistant Professor

Joe Zhou, PhD
Department of Neurosurgery and Radiology

Prashant Banerjee, PhD
Department of Mechanical and Industrial Engineering

Keith Thulborn, MD, PhD
Director, Center for Magnetic Resonance Research

Acute Care Nurse Practitioners:

Katherine W. Walsh, RN, MSN, ACNP-CS
Clinical Program Director, Illinois Stroke Institute

Sybille Nelson, RN, MSN, ACNP-CS

Robert Gottschalk, NP

Grace Mazurek, NP

Rita Berendt, NP

Allison Blood, BSN, MSN, FNP-CS

Christy Gomez, BSN, MSN, AG-ACNP


Laurie Smith, RN

Leslie Stangel, RN


Jeffrey Jopes, MBA
Director of Administrative Operations

Avis Foster
Program Coodinator for Educational Services

Linda Rose-Finnell, MPA, CCRA
Research Manager