Meet Our Experts

A team of recognized experts

The cancer-fighting technology at McLaren Proton Therapy Center is truly innovative, and the team of experts behind it is just as impressive. We’re very proud of our highly accomplished and experienced staff that includes leading radiation oncologists and physicists, as well as other key medical professionals.

These experts are constantly pushing the frontiers of this technology, conducting critical research that will help to further advance this cutting-edge therapy while keeping their primary focus on destroying the cancer and providing patients with the best possible quality of life. This focus on medical expertise is blended with an emphasis on providing emotional, social and spiritual support for patients and their families.

Meet Our Physicians

Hesham Gayar, MD

Hesham Gayar, M.D., a board certified radiation oncologist, is Medical Director for the McLaren Proton Therapy Center. He also serves as Vice President for the Particle Therapy Co-Operative Group (PTCOG) -North American Chapter and as a board member and Steering Committee member for PTCOG worldwide. His involvement in proton therapy also includes membership on the Executive Committee of the Proton Collaborative Group Medical Societies and as a member of the World Forum on Particle Therapy Strategic Planning for 2030. He holds numerous leadership positions at McLaren, including serving as chairman of the Department of Radiation Oncology at McLaren Flint, Associate Medical Director of the Karmanos Cancer Institutes at McLaren Flint, Owosso and Lapeer, Chairman of the Research Advisory Board at McLaren Health Care, and Chairman of the Karmanos Cancer Institute Clinical Leadership Council.

Dr. Gayar earned his medical degree from the Alexandria School of Science in Egypt and completed a residency at St. Vincent’s Hospital in New York and a fellowship at Ohio State University. He also completed training in proton therapy at the Paul Scherrer Institute. He is past president of the Board of Directors of the Genesee County Medical Society, a RTOG Principal Investigator with the Michigan State Medical Society, an American College of Surgeons Liaison Physician and a member of the Scientific Advisory Board for the Cancer Terminator Foundation. Read Dr. Gayar's full physician profile.


Omar Gayar, MD

Omar Gayar, M.D., is a board certified radiation oncologist. He completed medical school at the University of Missouri in Kansas City. He also completed his transitional year internship and radiation oncology residency at Henry Ford Hospital in Detroit, Michigan, where he served as chief resident. He is now a practicing Radiation Oncologist at the McLaren Proton Therapy Center, and the Karmanos Cancer Institutes in McLaren Flint, Lapeer, and Owosso, Michigan.

Dr. Gayar has served on multiple committees including the Internal Review Board, Lapeer Cancer Committee, and Financial Sub-committee in Lapeer. Read Dr. Gayar's full physician profile.


Christian Hyde, MD

Christian Hyde, MD, DABR is a board certified radiation oncologist. Only a small percentage of radiation specialists have completed a fellowship training program in proton therapy. During 2018-2019, Dr. Hyde subspecialized in proton therapy and related studies at William Beaumont Hospital in Royal Oak, Michigan. Dr. Hyde has concentrated his practice on promising new technologies, like proton therapy, to offer his cancer patients the most current treatment options available.

Dr. Hyde started practicing at McLaren in 2019. Before coming to McLaren, Dr. Hyde earned his medical degree from the UCLA School of Medicine, where he also completed his four-year residency in radiation oncology. He practiced with the Huntsman-Intermountain Cancer network in Utah for six years, then for six years in Atlanta, Georgia, where he helped launch a brand-new cancer-only hospital.

Dr. Hyde has specialized interests in proton therapy for complex cancers, re-irradiation and radiosurgery of the brain, lung and liver. One of the things that drew Dr. Hyde to radiation oncology was its ability to help spare patients from disfiguring or disabling radical surgeries that are commonly used to remove the breast, prostate and voice box. He works as a tireless partner with other physicians, including surgeons and medical oncologists who may prescribe chemotherapy or immunotherapy in combination with radiation therapy. Dr. Hyde is active in clinical research and has enrolled patients in exciting new clinical trials through the Karmanos Cancer Network. Dr. Hyde is dedicated to patient-centered care and is proud to be part of the McLaren Proton Therapy Center and the larger Karmanos Cancer Institute team.

Read Dr. Hyde's full physician profile.


Brian Yeh, MD, PhD

Brian Yeh, MD, PhD, is a board-certified radiation oncologist who specializes in proton therapy treatment for central nervous system cancers, head and neck cancers, lung cancer, lymphoma, gastrointestinal cancers, breast cancer, and pediatric cancers.

Dr. Yeh has over a decade of experience in using proton therapy to treat cancer. He served as a radiation oncologist at the New York Proton Center in New York City and at the ProCure Proton Therapy Center in Somerset, New Jersey. He is one of few who has completed special fellowship training in proton therapy at MD Anderson Cancer Center in Houston, Texas, one of the nation’s top cancer treatment and research centers. Dr. Yeh’s residency and internship training was completed at the University of California Los Angeles Medical Center in Los Angeles, California.

Dr. Yeh participates in clinical research and has co-authored peer-reviewed publications studying proton therapy treatments for head and neck cancers, breast cancer and pediatric cancers. He has held faculty appointments and has taught medical students and residents at the Icahn School of Medicine at Mount Sinai (New York City), where he also was the Director of Proton Beam Therapy, and at the NYU Grossman School of Medicine (New York City).

Read Dr. Yeh’s full physician profile.