Photo of Deborah Marshall

Deborah C Marshall, MD

    • Position
    • ADJUNCT ASSISTANT PROFESSOR | Radiation Oncology
    • Language
    • English

Deborah C. Marshall is an Assistant Professor in the Department of Radiation Oncology and in the Blavatnik Family Women’s Health Research Institute at the Icahn School of Medicine at Mount Sinai (ISMMS).  After completing a combined medical and graduate degree at the University of California San Diego School of Medicine, she completed her transitional year internship at Memorial Sloan Kettering Cancer Center and residency in Radiation Oncology at ISMMS. During residency, she conducted research as part of the American Board of Radiology Holman Research Pathway and an NIH T32 postdoctoral fellowship.

Dr. Marshall is a physician with clinical expertise centered on treating young adults with cancer, as well as patients with breast, gastrointestinal and gynecologic cancers.  She approaches each individual with the goal of maximizing the benefits of treatment while minimizing side effects using targeted approaches such as proton therapy, intensity-modulated radiation therapy, and image-guided radiation therapy to create a highly customized radiation therapy plan.  Her team's focus is providing compassionate care for the whole patient and their caregivers with a commitment to excellence in clinical oncology care. 

In addition to providing advanced radiotherapy to a diverse population of cancer patients, Dr. Marshall directs an NIH-funded laboratory aiming to advance the understanding of the impacts of radiotherapy on sexual function in women and female-bodied cancer patients across the lifespan. By applying radiobiologic, imaging, and multi-omic methods in human research, her goal is to prevent and mitigate the effects of radiotherapy on sexual function and to improve quality of life after cancer treatment.  She also investigates the impacts of transparency policies in medicine and improving oncology outcomes in women and persons living with HIV.  

Research Topics

Cancer, Epidemiology, Epigenomics, Genomics, HIV/AIDS, Health Services Research, Imaging, Palliative Care, Patient Centered Outcomes Research, Personalized Medicine, Translational Research


BA, University of California Berkeley

MAS, University of California San Diego

MD, University of California San Diego School of Medicine