Dr. Marshall is a board certified Radiation Oncologist, specializing in Gastrointestinal and Genitourinary cancers, although he also has broad interests in pediatric tumors, melanoma and aggressive skin cancers, lymphomas, and sarcomas. He has published widely in GI and GU cancers and has brought innovative treatment options to the people of South Carolina, including Y-90 microsphere therapy for liver cancers, and seed implants for prostate cancer using custom-built linked seeds using real-time interactive dosimetry in the operating room. In addition, Dr. Marshall is interested in the development of novel ways of improving accuracy of radiotherapy using new immobilization and image-guided techniques.
Dr. Marshall is the director of the Radiation Oncology Resident Training Program at MUSC, and enjoys working with residents to both improve the care of his patients and educate future radiation oncologists. He is currently the president of the national Association of Directors of Radiation Oncology Programs. Dr. Marshall also serves on the Cancer Care Committees of the Hollings Cancer Center and the Ralph H. Johnson VA Medical Center, as well as the Graduate Medical Education Committee and the Institutional Review Board of MUSC.