Guilherme Barros, M.D.

Portrait of Guilherme Barros, M.D.
Job Title

Guil was born in Rio de Janeiro, Brazil and resettled in New Jersey with his family. He studied Biomedical Engineering as an undergraduate at Johns Hopkins University. During his time in Baltimore, he served as a design team leader and developed a mobile phone-integrated tool for anemia screening in developing countries, culminating in a U.S. patent. He also worked in a wet lab studying the mechanisms of endothelial cell dysfunction during aging and atherosclerosis. As a medical student at Jefferson he immersed himself in cerebrovascular neurosurgery research studying the indications, techniques, and complications of both endovascular and open treatment options for aneurysms. He also performed functional neurosurgery research, analyzing imaging methods in DBS and sEEG trajectory planning. Guil enjoys spending his time off in the outdoors skiing, hiking, playing tennis, or running. His other hobbies include traveling, photography, and cooking. Guil speaks fluent Portuguese and Italian.

Select awards and honors:

Gold Humanism Honors Society; 2016

Bill & Melinda Gates Foundation Seed Grant, Saving Lives at Birth: A Grand Challenge for Development Competition; 2012

Clinical Interest

Skull Base

Research Interests

Device Design


Undergraduate Education

Johns Hopkins University

Postgraduate Education

Georgetown University

Medical School

Thomas Jefferson University


Chalouhi N, Daou B, Barros G, Starke RM, Chitale A, Ghobrial G, Dalyai R, Hasan D, Gonzalez LF, Tjoumakaris S, Rosenwasser RH, Jabbour P. Matched Comparison of Flow Diversion and Coiling in Small, Noncomplex Intracranial Aneurysms. Neurosurgery. 2017.


Daou B, Chalouhi N, Tjoumakaris S, Hasan D, Barros G, Rosenwasser RH, Jabbour P. Alternative access for treatment of cerebrovascular diseases. Clinical Neurology and Neurosurgery. 2016; 245: 89-95.


Daou B, Chalouhi N, Starke RM, Barros G, Ya'qoub L, Do J, Tjoumakaris S, Rosenwasser RH, Jabbour P. Clipping of previously coiled cerebral aneurysms: efficacy, safety, and predictors in a cohort of 111 patients. Journal of Neurosurgery. 2016:1-7.


Chalouhi N, Daou B, Okabe T, Starke RM, Dalyai R, Bovenzi CD, Anderson EC, Barros G, Reese A, Jabbour P, Tjoumakaris S, Rosenwasser RH, Kraft WK, Rincon F. Beta-blocker therapy and impact on outcome after aneurysmal subarachnoid hemorrhage: a cohort study. Journal of Neurosurgery. 2016;125:730-736.


Daou B, Starke RM, Chalouhi N, Barros G, Tjoumakaris S, Rosenwasser RH, Jabbour P. P2Y12 reaction units: effect on hemorrhagic and thromboembolic complications in patients with cerebral aneurysms treated with the Pipeline Embolization Device. Neurosurgery. 2015;78:27-33.


Chalouhi N, Polifka A, Daou B, Kung D, Barros G, Tjoumakaris S, Gonzalez LF, Starke RM, Hasan D, Judy B, Rosenwasser RH, Jabbour P. In-pipeline stenosis: incidence, predictors, and clinical outcomes. Neurosurgery. 2015;77:875-879.


Barros G, Krupa K, Krupa K, Madineni R, Kenyon LC, Farrell CJ. A rare case of a systemic non-Langerhans histiocytosis presenting with diabetes insipidus and a tentorial mass. Jefferson Hospital for Neuroscience Journal. 2015;10(1): Article 3.


Zanaty M, Chalouhi N, Barros G, Schwartz EW, Saigh MP, Starke RM, Whiting A, Tjoumakaris S, Hasan D, Rosenwasser RH, Jabbour P. Flow-diversion for ophthalmic segment aneurysms. Neurosurgery. 2015;76(3):286-9.


Zanaty M, Barros G, Chalouhi N, Starke RM, Manasseh P, Tjoumakaris S, Shields CL, Hasan D, Bulsara K, Rosenwasser RH, Jabbour P. Update on intra-arterial chemotherapy for retinoblastoma. Scientific World Journal. 2014;2014:869604.


Zanaty M, Chalouhi N, Starke RM, Barros G, Saigh MP, Schwartz EW, Ajiboye N, Tjoumakaris S, Hasan D, Rosenwasser RH, Jabbour P. Flow diversion versus conventional treatment for carotid cavernous aneurysms. Stroke. 2014; 45:2656-2661.


Barros G, Chen W, Chen GM, Greenbaum NL, Doong JC, Yin D, Oh PJ, Acharya S. A non-invasive bio-fluid detector and portable sensor-transmitter-receiver system. United States Patent Application 20150164396, PCT/US2013/034361, filed March 28, 2013.