texas oncology more breakthroughs. more victories
Some of our cancer centers may have important notifications found on the location page. View More Important Notifications x



Ryan Tierney, M.D.

Ryan Tierney, M.D. Photo

Provider Type: Physician

Board Certifications:
  • Radiation Oncology



  • Chief Resident in Radiation Oncology
    Barnes-Jewish Hospital of Washington University, St. Louis, MO 
  • Residency in Radiation Oncology
    Barnes-Jewish Hospital of Washington University, St. Louis, MO
  • Internship in Internal Medicine
    Barnes-Jewish Hospital of Washington University, St. Louis, MO
  • Medical Doctorate
    Washington University, St. Louis, MO
  • Bachelor of Arts in Economics, Chemistry, Spanish
    Indiana University, Bloomington, IN

Accolades & Memberships

  • ​Alpha Omega Alpha Medical Honors Society
  • Distinguished Alumni Scholar
  • Herman B. Wells Scholar
  • Austin’s Top Doctors, Radiation Oncology, Austin Monthly (2021)

Clinical Skills

Intensity Modulated Radiation Therapy (IMRT)

  • Tomotherapy Hi-Art
  • Pinnacle
  • Eclipse
  • CMS treatment planning systems
Image-Guided and Adaptive Radiation Therapy
  • Varian Trilogy-based kilovoltage cone-beam CT
  • Brain-Lab-based kilovoltage cone-beam CT
  • Tomotherapy-based magavoltage CT
  • Electronic portal imaging
  • PET/MRI/CT to CT fusion
Partial Breast Irradiation
  • External beam radiation therapy
  • Brachytherapy via interstitial implantation
  • SAVI
  • MammoSite RTS
Gamma Knife and Linear-Accelerator-Based Radiosurgery
  • Gamma Knife radiosurgery
  • Elekta Gamma Knife C unit
  • Leksell / GammaPlan 5.31 software
  • BrainLab
  • Trilogy
  • Tomotherapy-based extracranial stereotactic radiosurgery
  • Elekta Stereotactic Body Frame immobilization device
  • BodyFIX immobilization device
Prostate Brachytherapy
  • Ultrasounded-guided I125 permanent seed implants using rapid strand, pre-loaded catheters and MIC applicators
  • Varian/VARISEED 7.1 MMS treatment planning software
Respiratory Gating and 4D CT
  • Varian Real-Time Position Management (RPM) with both fractionated and radiosurgical techniques
  • 4D CT simulation and its use in treatment planning
High Dose Rate (HDR) Bracytherapy
  • Placement of intracavitary HDR implants
  • Placement of interstitial HDR implants
  • Placement of HDR catheters
  • Associated 2D, 3D, PET/CT, and MRI-based treatment planning
  • Nucletron treatment planning system
  • VariSource treatment planning system
Unsealed Sources
  • Bexxar
  • Zevalin
  • Oral I131
  • SR89
  • SIRSphere administration
  • Sm153


  • Acute Toxicity of Postoperative IMRT and Chemotherapy for Endometrial Cancer

    Radiation Medicine, 2007

  • Definitive Chemoradiation for Cervical Cancer Patients With PET-Positive Para-aortic Lymphadenopathy

    ASTRO 2007 Annual Meeting, 2007

  • A Prospective Study of Differences in Duodenum Compared to Remaining Small Bowel Motion Between Radiation Treatments: Implications for Radiation Dose Escalation in Carcinoma of the Pancreas

    Radiation Oncology, 2006

  • Acute Toxicity of Postoperative IMRT and Chemotherapy for Endometrial Cancer

    ASTRO 2006 Annual Meeting, 2006

  • Prognostic Importance of Comorbidity in a Hospital-based Cancer Registry

    Journal of the American Medical Association, 2004

Show all Publications
  • Differential Prognostic Impact of Comorbidity

    Journal of Clinical Oncology, 2004

  • The Epidemiology of Bronchioloalveolar Carcinoma over the Past Two Decades: Analysis of the SEER Database

    Lung Cancer, 2004

  • The Epidemiology of Small Cell Lung Carcinoma

    ASCO 2002 Annual Meeting, 2002

  • Antidepressant Use and Use Patterns in Naturalistic Settings

    Drug Benefit Trends, 2000

  • Relationships between Symptom Relief, Quality of Life, and Satisfaction with Hospice Care

    Palliative Medicine, 1998

Community Service

  • Fellow, Barnes-Jewish Hospital Center for Diversity and Cultural Competence (2007-2009)
  • Volunteer, La Clinica (2003-2004)
  • Board of Directors, Saturday Neighborhood Health Clinic (2002-2003)
  • Director, Reproductive Health Education Program (2001-2002)
  • Volunteer, Students Teaching AIDS to Students (2001-2002)
  • Director of Marketing, Indiana University Dance Marathon (1998-1999)

Other Information

Dr. Tierney is originally from Indianapolis, though he has studied and lived in St. Louis, Mexico, Australia, and Japan. His interests include biking, watersports, motorsports, fishing, and spending time with his family.