Gary Lewis, M.D.Assistant Professor


  • B.S. in Biomedical Engineering from the University of Pennsylvania in Philadelphia, PA
  • M.D. from Drexel University College of Medicine in Philadelphia, PA
  • Internship in Internal Medicine at Crozer-Chester Medical Center in Upland, PA
  • Residency in Radiation Oncology from the University of Texas Medical Branch in Galveston, TX


Clinical Focus

  • Head and Neck malignancies
  • Pediatric malignancies
  • Gynecologic malignancies

Research Interest

  • Clinical Trials
  • Clinical Outcomes Research


  • The Role of Adjuvant Radiotherapy in the Treatment of Pleural Mesothelioma. Lewis GD, Dalwadi SM, Farach A, Brian Butler E, Teh BS. Ann Surg Oncol. 2019 Jun;26(6):1879-1885. doi: 10.1245/s10434-019-07235-9. Epub 2019 Feb 24.  PMID: 30798447
  • Survival Outcomes and Patterns of Management for Anal Adenocarcinoma.  Lewis GD, Haque W, Butler EB, Teh BS. Ann Surg Oncol. 2019 May;26(5):1351-1357. doi: 10.1245/s10434-019-07202-4. Epub 2019 Feb 4. PMID: 30719638
  • Radiation pneumonitis in pediatric Hodgkin lymphoma patients receiving radiation therapy to the chest. Lewis GD, Agrusa JE, Teh BS, Gramatges MM, Kothari V, Allen CE, Paulino AC. Pract Radiat Oncol. 2018 Sep – Oct;8(5):e364-e368. doi: 10.1016/j.prro.2018.01.007. Epub 2018 Feb 4. PMID: 29730281
  • The Role of Adjuvant Radiation Therapy in Locally Advanced Bladder Cancer.  Lewis GD, Haque W, Verma V, Butler EB, Teh BS. Bladder Cancer. 2018 Apr 26;4(2):205-213. doi: 10.3233/BLC-180163. PMID: 2973291
  • Early outcomes of uveal melanoma treated with intraoperative ultrasound guided brachytherapy using custom built plaques. Tann AW, Teh BS, Scarboro SB, Lewis GD, Bretana ME, Croft PC, Raizen Y, Butler EB, Kim RS, Chevez-Barrios P, Schefler AC. Pract Radiat Oncol. 2017 Jul – Aug;7(4):e275-e282. doi: 10.1016/j.prro.2017.01.002. Epub 2017 Jan 7 PMID: 28377140
  • Intensity-modulated proton therapy for nasopharyngeal carcinoma: Decreased radiation dose to normal structures and encouraging clinical outcomes. Lewis GD, Holliday EB, Kocak-Uzel E, Hernandez M, Garden AS, Rosenthal DI, Frank SJ.  Head Neck. 2016 Apr;38 Suppl 1:E1886-95. doi: 10.1002/hed.24341. Epub 2015 Dec 26.  PMID: 26705956