Dr. Marshall is a board certified Radiation Oncologist, specializing in Genitourinary and Gastrointestinal cancers. 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 and radiosurgical treatment for liver cancers, and new techniques using linked seeds for prostate brachytherapy. 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 also functions as the Deputy Associate Director for Clinical Investigations at the Hollings Cancer Center. He is active in several national scientific and professional organizations including, the Association of Directors of Radiation Oncology Programs, the American Society for Radiation Oncology, the American Society for Clinical Oncology, the American Radium Society, The American Brachytherapy Society, the Southwestern Oncology Group, and NRG Oncology.