Dr. Dunbar is originally from Texas and graduated from UT Southwestern Medical School. She completed her internal medicine residency at Johns Hopkins University in Baltimore, Maryland and was selected to be an Assistant Chief of Service for the program.  Her gastroenterology and hepatology fellowship was also at Johns Hopkins, where she completed a PhD in clinical investigation.  She is the Section Chief of Gastroenterology at the Dallas VA Medical Center and is an Associate Program Director for the UTSW Internal Medicine residency program. Her clinical and research interests include Barrett’s esophagus, gastroesophageal reflux disease, esophageal motility disorders, eosinophilic esophagitis, and novel endoscopic imaging technologies.


Rice University (1995), Biochemistry
Medical School
UT Southwestern Medical Center (2000), Medicine
Graduate School
Johns Hopkins University (2012), Clinical Investigation

Research Interest

  • Barrett's esophagus
  • Eosinophilic esophagitis
  • Esophageal motility disorders
  • Gastroesophageal reflux disease
  • Novel endoscopic imaging


Featured Publications LegendFeatured Publications

In Barrett's epithelial cells, weakly acidic bile salt solutions cause oxidative DNA damage with response and repair mediated by p38.
Huo X, Dunbar KB, Zhang X, Zhang Q, Spechler SJ, Souza RF, Am. J. Physiol. Gastrointest. Liver Physiol. 2020 03 318 3 G464-G478
Efficacy of Prophylactic Hemoclips in Prevention of Delayed Post-Polypectomy Bleeding in Patients with Large Colonic Polyps.
Feagins LA, Smith AD, Kim D, Halai A, Duttala S, Chebaa B, Lunsford T, Vizuete J, Mara M, Mascarenhas R, Meghani R, Kundrotas L, Dunbar KB, Cipher DJ, Harford WV, Spechler SJ, Gastroenterology 2019 May
Aberrant p53 Immunostaining in Barrett's Esophagus Predicts Neoplastic Progression: Systematic Review and Meta-Analyses.
Snyder P, Dunbar K, Cipher DJ, Souza RF, Spechler SJ, Konda VJA, Dig. Dis. Sci. 2019 05 64 5 1089-1097
Beyond Dysplasia Grade: The Role of Biomarkers in Stratifying Risk.
Dunbar KB, Souza RF Gastrointest. Endosc. Clin. N. Am. 2017 Jul 27 3 447-459
Unique Clinical Features of Los Angeles Grade D Esophagitis Suggest That Factors Other Than Gastroesophageal Reflux Contribute to its Pathogenesis.
Nguyen AD, Spechler SJ, Shuler MN, Souza RF, Dunbar KB J. Clin. Gastroenterol. 2017 Jun
How to Approach Lymphocytic Esophagitis.
Nguyen AD, Dunbar KB Curr Gastroenterol Rep 2017 Jun 19 6 24
Aspirin prevents NF-?B activation and CDX2 expression stimulated by acid and bile salts in oesophageal squamous cells of patients with Barrett's oesophagus.
Huo X, Zhang X, Yu C, Cheng E, Zhang Q, Dunbar KB, Pham TH, Lynch JP, Wang DH, Bresalier RS, Spechler SJ, Souza RF Gut 2017 Apr
Benchmarks for the interpretation of esophageal high-resolution manometry.
Yadlapati R, Keswani RN, Dunbar KB, Gawron AJ, Gyawali CP, Kahrilas PJ, Katz PO, Katzka D, Spechler SJ, Tatum R, Pandolfino JE Neurogastroenterol. Motil. 2016 Oct


Featured Books Legend Featured Books

Honors & Awards

  • D Magazine Best Doctors
    Gastroenterology (2018)
  • Lyman E. Bilhartz, M.D. Memorial Teaching Award
    UT Southwestern, Department of Internal Medicine, Division of Digestive and Liver Diseases (2013)
  • UT Southwestern LEAD Program Participant
    UT Southwestern Leadership Program (2012)
  • World Endoscopy Organization Research Award
    Awarded to young investiagor in gastroenterology for endoscopic research excellence (2011)
  • Women's Leadership Award
    Johns Hopkins Women's Network, Johns Hopkins Medical Institutions (2005)
  • Alpha Omega Alpha
    Medical Honor Society (2000)
  • Ho Din Award of the Southwestern Medical Foundation
    AWarded to outstanding medical school graduate from UT Southwestern Medical School (2000)

Professional Associations/Affiliations

  • American Neurogastroenterology and Motility Society (2013)
  • American College of Gastroenterology (2006)
  • American Society of Gastrointestinal Endoscopy (2004)
  • American Gastroenterological Association (2003)