Dr. Geiger joined GenesisCare in 2018, bringing significant clinical and research expertise, having contributed to numerous abstracts and journal publications on radiation therapy and cancer treatments. He has presented this data at a number of national and international meetings as well as authoring several textbook chapters. He is currently an Assistant Professor of Radiation Oncology at the University of Central Florida College of Medicine. He brings special expertise on proton therapy, brachytherapy, as well as stereotactic radiosurgery, having worked extensively with both CyberKnife and Gamma Knife radiosurgery platforms. His special interests include treatment of head and neck cancers, skull base tumors, skin cancers, gynecological cancers, genitourinary, and gastrointestinal malignancies. He completed his medical school training at the University of Pennsylvania School of Medicine and his internship and residency at the Hospital of the University of Pennsylvania in Philadelphia before joining the faculty there as an Assistant Professor of Radiation Oncology from 2012-2017, where he was the only faculty member simultaneously treating patients with both x-ray and proton radiotherapy, brachytherapy, as well as CyberKnife and Gammaknife radiosurgery. When not treating cancer patients, Dr. Geiger is a musician, avid photographer, both above and below water, and is a Master Scuba Diver.
- Bates College, B.S., Biological Chemistry, Lewiston, Maine
- University of Pennsylvania School of Medicine, Doctor of Medicine, Philadelphia, Pennsylvania
- Hospital of the University of Pennsylvania, Radiation Oncology, Philadelphia, Pennsylvania
- Hospital of the University of Pennsylvania, Internal Medicine, Philadelphia, Pennsylvania
Expertise And Interests
- Expertise in Head & Neck, Skin, Gynecological, Gastrointestinal, and Genitourinary Malignancies as well as extensive experience with Proton therapy, brachytherapy, and radiosurgery (CyberKnife & Gamma Knife) in addition to standard x-ray radiotherapy (3D
Awards and honors
- Charles A. Dana Scholar, Summa Cum Laude, Phi Beta Kappa, Gamma of Maine, Sigma Xi Honor society, NIH Cancer Research Fellowship recipient, Ruth L. Kirschstein NRSA Award National Research Service Grant, and recipient of the Rose Meadow Levinson Memorial
- A Phase II Trial of Alternative Volumes of Oropharyngeal Irradiation for De-intensification (AVOID): Omission of the Resected Primary Tumor Bed Following Transoral Robotic Surgery for Human Papilloma Virus Related Squamous Cell Carcinoma of the Oropharynx
- Toxicity of Gamma Knife Radiosurgery May Be Greater in Patients with Lower Cranial Nerve Schwannomas.
- Toxicity of Gamma Knife Radiosurgery May Be Greater in Patients with Lower Cranial Nerve Schwannomas
- A Phase 2 Trial of Alternative Volumes of Oropharyngeal Irradiation for De-intensification (AVOID): Omission of the Resected Primary Tumor Bed After Transoral Robotic Surgery for Human Papilloma Virus-Related Squamous Cell Carcinoma of the Orophary