Current Medical Residents

2025 - 2026 Radiation Oncology Residents

 

  • Hayden Byrd, M.D.

    Chief Resident '26

    Hometown: Austin, Texas

    Undergraduate: Sewanee- The University of The South

    Medical school: University of Texas at Houston

    Internship: University of Tennessee Medical Center at Knoxville

    Research interests: Radiation for benign diseases such as low dose radiation for osteoarthritis, toxicity outcomes following radiation, novel indications for radiation. 

    Outside interests: Community; Lacrosse; Outdoors (backpacking, climbing, caving, mountaineering); Violin; Writing

  • Jayden Curry Gracie, M.D.

    Chief Resident '26

    Hometown: Memphis, TN

    Undergraduate: Vanderbilt University

    Medical School: University of Florida

    Internship: Vanderbilt University Medical Center, Internal Medicine Prelim

    Research Interests: rare disease, treatment toxicity, particle therapy, healthcare system improvement

    Outside Interests: dancing (salsa, bachata), painting, home building and interior design, plugging into my faith community, travel, going to the zoo, shopping, horseback riding, being outdoors, eating good food that other people make, writing and inspiring others to live their best lives

  • Michael Kessler, MD

    Resident '27

    Hometown: Nashville, TN

    Undergraduate: University of Wisconsin - Madison

    Medical school: University of Tennessee Health Science Center

    Internship: University of Tennessee Nashville Internal Medicine Preliminary

    Research interests: Brachytherapy, Toxicity/Quality of Life, Lung Cancer, Immunotherapy

    Outside interests: Camping, fishing, traveling, intramural sports, fitness/weightlifting, running, golf

  • Gustavo Sosa, MD

    Resident '27

    Hometown: Sacramento, CA

    Undergraduate: University of Southern California

    Medical School: University of Wisconsin School of Medicine and Public Health

    Internship: Internal Medicine, University of Nevada, Las Vegas

    Research interests: Palliative radiotherapy, bone and soft tissue sarcoma, survivorship

    Outside interests: cooking, college football, golf, history, exploring the Nashville food scene

  • Betsy Crosswhite, MD

    Resident '28

    Hometown: Tupelo, MS

    Undergraduate: University of Mississippi

    Medical school: University of Mississippi Medical Center

    Internship: Vanderbilt University Medical Center

               Research interests: clinical trials, treatment toxicity

    Outside interests: cooking, trying new restaurants, ballet, faith

  • Callie Rizzardi, MD

    Resident '28

    Hometown: South Deerfield, Massachusetts

    Undergraduate: University of Massachusetts Amherst

    Medical school: Eastern Virginial Medical School

    Internship: Eastern Virginial Medical School

    Research interests: palliative therapy, quality of life

    Outside interests: hiking, rock climbing, music, traveling, yoga, weightlifting

  • David Gannon, MD

    Resident '28

    Hometown: Minneapolis, Minnesota

    Undergraduate: Lafayette College 

    Medical school: Loyola University Chicago 

    Internship: General Surgery, Loyola University Medical Center 

    Research interests: Brachytherapy, SBRT

    Outside interests: Travel, Reading, History, Film

  • Alemu Kihshen, MD

    Resident '29

    Hometown:  Wukro, Tigray, Ethiopia

    Medical school:  Addis Ababa University School of Medicine, Ethiopia 

    Internship:  Internal Medicine, University of Louisville 

    Research interests: Global oncology care disparities, Brachytherapy,  benign disease

    Outside interests: History,  English Premier League, playing soccer, running 

  • Jacob Menke, MD

    Resident '29

    Hometown: Cincinnati, OH

    Undergraduate: Rhodes College

    Medical School: University of Cincinnati

    Internship: Transitional Year; TriStar Centennial Medical Center, Nashville, TN

    Research Interests: head and neck cancers, prostate cancer, benign diseases

    Outside Interests: playing pickleball, country music, watching sports, working out, trying new restaurants