Associate Chair, Radiation Oncology
Associate Residency Program Director, Department of Radiation Oncology 
Catharine and Howard Avery Professor, Radiation Oncology
Stanford School of Medicine
Chief, Radiation Oncology Service, Lucile Packard Children’s Hospital 

Sarah S. Donaldson is the Catharine and Howard Avery Professor in the Department of Radiation Oncology at Stanford University School of Medicine. She is also Associate Director of the residency program at Stanford’s Department of Radiation Oncology and Chief of the Radiation Oncology service at the Packard Children’s Hospital in Stanford, California. She is a member of the National Academy of Medicine/Institute of Medicine and a fellow of AAAS, ASTRO, ACR, and ASCO. Dr. Donaldson has broad expertise in Radiation Oncology with particular interest in Pediatrics, Breast, CNS, Sarcoma Lymphoma, and rare tumors. She is widely regarded as an authority in pediatric radiation oncology having served as a founding member as the Children’s Oncology Group and the Childhood Cancer Survivor’s Study. She has served as principal investigator on Pediatric Hodgkins Lymphoma, Rhabdomyosarcoma, and Ewings Sarcoma clinical trials.

Radiation Oncologist
Memorial Sloan Kettering Cancer Center

Dr. Wolden has extensive experience treating rare diseases in young people such as sarcomas, brain tumors, neuroblastoma, Wilms’ tumor, lymphoma, and leukemia. She is a leader in the use of targeted approaches such as proton therapy, intensity-modulated radiation therapy, image-guided radiation therapy, and intra-operative radiation therapy for pediatric cancers. Her clinical research has led to changes in the approach to the treatment of tumors such as medulloblastoma and central nervous system germ cell tumors. She is very mindful of patients’ long-term quality of life and seek to maintain the highest possible survival rates while minimizing the risk of potential long-term treatment complications. Dr. Wolden is involved in numerous clinical trials and oversees large international studies for the Children’s Oncology Group in the areas of soft tissue sarcoma and Hodgkin lymphoma. She is also involved with research on the late effects of radiation therapy through her collaboration with the Childhood Cancer Survivor Study.

Professor, Radiation Oncology and Neurosurgery
Medical Director of the Proton Therapy Center
Associate Director of the Brain Tumor Center
University of Cincinnati Cancer Institute 

John Breneman, MD, is professor of Radiation Oncology and Neurosurgery in the College of Medicine. He serves as medical director of the Cincinnati Children’s/UC Medical Center Proton Therapy Center, associate director of the UC Brain Tumor Center, co-director of the Precision Radiotherapy Center and vice-chair for the Department of Radiation Oncology at the University of Cincinnati College of Medicine. He started as a radiation oncologist at the University of Cincinnati Medical Center in 1985 and joined the University of Cincinnati Gardner Neuroscience Institute team in 1999.

Dr. Breneman serves on the American Board of Radiology as Chair of the Central Nervous System (CNS) Committee.  He has been an invited speaker to numerous regional and national meetings, and is an active clinical researcher with over 80 research publications and contributions to several textbooks.  He has a particular interest and expertise in the development and implementation of new technologies for use in the treatment of adults and children with brain tumors.