Dr. Keith R. Unger, MD

Dr. Keith R. Unger, MD

Dr. Keith R. Unger, MD

Languages: English
Fax: (202) 444-1610

Contact this Provider:

  • Radiation Oncology
Conditions I Treat
  • acoustic neuroma
  • anal cancer
  • arteriovenous malformation
  • astrocytoma tumors
  • bladder cancer
  • Show All
Procedures I Perform
  • 3d conformal radiation therapy
  • balloon breast brachytherapy
  • brachytherapy
  • chemoradiation
  • combined modality therapy
  • Show All
About the Provider

Board-certified radiation oncologist, Keith Unger, MD, is director of the Gastrointestinal Cancer Service for the Department of Radiation Medicine at MedStar Georgetown University Hospital, and director for the department's residency training program. Concurrently, he serves as associate professor of Radiation Medicine at the Georgetown University School of Medicine.

Dr. Unger completed his internship at MedStar Washington Hospital Center and residency at MedStar Georgetown University Hospital, including a year as chief resident for Radiation Oncology. He received both his undergraduate and medical degree from the University of Virginia, where he was the recipient of numerous academic honors and awards.

As a researcher and educator, Dr. Unger has been a co-author to multiple text book chapters and publications in peer-reviewed journals, as well as a presenter at major medical meetings. His research focuses on the development of novel radiation therapy techniques and reduction in treatment-related side effects.

Dr. Unger sees patients at both MedStar Georgetown University Hospital and MedStar Southern Maryland Hospital.

Conditions Treated:

  • Pancreatic cancer
  • Liver cancer
  • Esophageal cancer
  • Colorectal cancer
  • Other gastrointestinal cancers
  • Sarcomas
  • Brain and spine cancer
  • Breast cancer
  • General radiation oncology
Procedures performed:
  • Proton therapy
  • Intensity modulation radiation therapy (IMRT)
  • Stereotactic body radiation therapy, CyberKnife
  • Stereotactic radiosurgery, CyberKnife
  • Selective internal radiation therapy (TheraSpheres, Sirs Spherers)
  • Intraoperative radiation therapy (INTRABEAM)

  • Residency Program: MedStar Georgetown University Hospital (2011)
  • Internship Program: MedStar Washington Hospital Center (2007)
  • Internship/Residency: MedStar Washington Hospital Center (2007)
  • Medical School: University of Virginia School of Medicine (2006)
  • Board Certification: American Board of Radiology, Radiation Oncology

Kress MA, Sen N, Unger KR, Lominska CE, Deeken JF, Davidson BJ, Newkirk KA, Hwang J, Harter KW. "Safety and efficacy of hypofractionated stereotactic body reirradiation in head and neck cancer: Long term follow-up of a large series." Head Neck. (37)10. 2014.

Gurka M, Kim C, He R, Charabaty A, Haddad N, Turocy J, Johnson L, Jackson P, Weiner L, Marshall J, Collins S, Pishvaian M, Unger K. "Stereotactic Body Radiation Therapy (SBRT) combined with chemotherapy for unresected pancreatic adenocarcinoma." Am J Clin Oncol. 2014.Epub ahead of print.

Lischalk J, Oermann E, Collins S, Nair M, Nayar V, Bhasin R, Voyadzis J, Rudra S, Unger K, Collins B. "Five-fraction stereotactic radiosurgery (SRS) for single inoperable high-risk non-small cell lung cancer (NSCLC) brain metastasis." Radiat Oncol. 10:2016. 2015.

Lischalk J, Kole T, Anjum H, Obayomi-Davies O, Rashid A, Unger K. "Four-dimensional computed tomography prediction of inter- and intrafractional upper gastrointestinal tumor motion during fractionated stereotactic body radiation therapy." Pract Radiat Oncol. 15. 2016.

Gabrielson A, Miller A, Banovac F, Kim A, He AR, Unger K. "Outcomes and predictors of toxicity after selective internal radiation therapy using Yttrium-90 Resin Microspheres for unresectable hepatocellular carcinoma." Front Oncol. 5:292. 2015


Practice Locations
Member of Medical Staff
  • MedStar Southern Maryland Hospital Center
  • MedStar Georgetown University Hospital
  • Association of Residents in Radiation Oncology Educator of the Year
  • Radiation Research Society Scholars in Training Travel Award