Thornton B. A. Mason, MD, PhD, MSCE

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Thornton Mason, MD, PhD, MSCE, is a pediatric neurologist at Children’s Hospital of Philadelphia.

Areas of Expertise: Genetic etiologies of pediatric sleep dysfunction, Neurological issues in pediatric sleep medicine
Locations: Main Campus; Specialty Care, Virtua

Appointments and Referrals: 1-800-TRY-CHOP (1-800-879-2467)

Education and Training

Medical School

MD - Medical College of Virginia, Richmond, VA


Tulane University Medical Center, New Orleans, LA


Columbia-Presbyterian Medical Center, New York, NY


Children's Hospital of Philadelphia/University of Pennsylvania, Philadelphia, PA

Board Certification

Neurology with special qualifications in Child Neurology
Sleep Medicine

Titles and Academic Titles

Attending Physician

Associate Professor of Clinical Neurology, Perelman School of Medicine at the University of Pennsylvania

Departments and Services

Research Interests

Periodic limb movements in sleep
Genetic disorders and sleep




Stowe, R.C., Elkhatib Smidt, S.D., Mason, T.A.: Emerging Subspecialties in Neurology: Sleep medicine fellowship after child neurology. Neurology ­94: 1-4, 2020


Afolabi-Brown O, Mason TBA 2nd. Kleine-Levin Syndrome. Paediatr Respir Rev. 2018 Jan;25:9-13. doi: 10.1016/j.prrv.2016.12.004. Epub 2016 Dec 23. Review.


Kennedy WP, Mudd PA, Maguire MA, Souders MC, McDonald-McGinn DM, Marcus CL, Zackai EH, Solot CB, Mason TB, Jackson OA, Elden LM. 22q11.2 Deletion syndrome and obstructive sleep apnea. Int J Pediatr Otorhinolaryngol. 2014 Aug;78(8):1360-4. doi: 10.1016/j.ijporl.2014.05.031. Epub 2014 Jun 6. 


Prashad Priya S, Marcus Carole L, Brown Lawrence W, Dlugos Dennis J, Feygin Tamara, Harding Brian N, Heuer Gregory G, Thornton B Alexander Mason: Brain Tumor Presenting as Somnambulism in an Adolescent. Pediatric Neurology 2013.

Kennedy, W.P., Mudd, P.A., Maguire M.A., Souders, M.C., McDonald-McGinn, D.M., Marcus, C.L., Zachai E.H., Solot C.B., Mason, T.B.A., Jackson, O.A., and Elden, L.M.: 22q11.2 deletion syndrome and obstructive sleep apnea. Int J Pediatr Otorhinolaryngol. 2014 Aug;78(8):1360-4. doi: 10.1016/j.ijporl.2014.05.031. Epub 2014 Jun 6.

Marcus, C.L., Traylor, J., Gallagher, P.R., Brooks, L.J., Huang, J., Koren, D., Katz, L., Mason, T.B.A., and Tapia, I.E.: Prevalence of periodic limb movements during sleep in normal children. Sleep. 2014 Aug 1;37(8):1349-52. doi: 10.5665/sleep.3928.

Ong Bruce A, Caboot Jason, Jawad Abbas, McDonough Joseph, Jackson Tannoa, Arens Raanan, Marcus Carole L, Smith-Whitley Kim, Mason Thornton B A, Ohene-Frempong Kwaku, Allen Julian L: Respiratory muscle force and lung volume changes in a population of children with sickle cell disease. Br J Haematol. 2013 Oct;163(1):112-7. doi: 10.1111/bjh.12481. Epub 2013 Jul 20.


DeScipio C, Conlin L, Rosenfeld J, Tepperberg J, Pasion R, Patel A, McDonald MT, Aradhya S, Ho D, Goldstein J, McGuire M, Mulchandani S, Medne L, Rupps R, Serrano AH, Thorland EC, Tsai AC, Hilhorst-Hofstee Y, Ruivenkamp CA, Van Esch H, Addor MC, Martinet D, Mason TB, Clark D, Spinner NB, Krantz ID. Subtelomeric deletion of chromosome 10p15.3: clinical findings and molecular cytogenetic characterization. Am J Med Genet A. 2012 Sep;158A(9):2152-61. doi: 10.1002/ajmg.a.35574. Epub 2012 Jul 27. PubMed PMID: 22847950; PubMed Central PMCID: PMC3429713.

Rogers VE, Gallagher PR, Marcus CL, Ohene-Frempong K, Traylor JT, Mason TB. Capturing PLMS and their variability in children with sickle cell disease: does ankle activity monitoring measure up to polysomnography? Sleep Med. 2012 Sep;13(8):1013-20. doi: 10.1016/j.sleep.2012.06.016. Epub 2012 Jul 25. PubMed PMID: 22841030.

Caboot JB, Jawad AF, McDonough JM, Bowdre CY, Arens R, Marcus CL, Mason TB, Smith-Whitley K, Ohene-Frempong K, Allen JL. Non-invasive measurements of carboxyhemoglobin and methemoglobin in children with sickle cell disease. Pediatr Pulmonol. 2012 Aug;47(8):808-15. doi: 10.1002/ppul.22504. Epub 2012 Feb 10. PubMed PMID: 22328189; PubMed Central PMCID: PMC3368100.

Strauss T, Sin S, Marcus CL, Mason TB, McDonough JM, Allen JL, Caboot JB, Bowdre CY, Jawad AF, Smith-Whitley K, Ohene-Frempong K, Pack AI, Arens R. Upper airway lymphoid tissue size in children with sickle cell disease. Chest. 2012 Jul;142(1):94-100. doi: 10.1378/chest.11-2013. PubMed PMID: 22241762; PubMed Central PMCID: PMC3419377.




Mason, T.B.A.: Sleep Terrors. Encyclopedia of Sleep Kushida, C. (eds.). Elsevier, 2013. Notes: Alternative Media. 


Mason, T.B.A. Genetics of parasomnias. Pack, A.I., ed. Sleep Medicine Clinics 6: 229- 236, 2011.

Editorial and Academic Positions


Reviewer, Sleep 2003-present
Reviewer, European Journal of Pediatric Neurology 2006-present

Academic and Institutional Committees:

2005 -   Fellowship Committee, Division of Sleep Medicine, University of Pennsylvania

9 South (CHOP Main Hospital) Neurology Medical Director, 9 South Patient Safety Officer, Co-chair 9 South Unit Partners Leadership Committee