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Dr. Derek Tsang is a Clinician Investigator in the Radiation Medicine Program at Princess Margaret Cancer Centre. He completed his medical training at Queen’s University, followed by residency in radiation oncology at the University of Toronto. He obtained fellowship training in pediatric radiation oncology at St. Jude Children’s Research Hospital, and completed a Master's degree in clinical epidemiology at the Harvard T.H. Chan School of Public Health. He joined the Radiation Medicine Program in 2017 and is a member of the pediatric and adult central nervous system (CNS) tumour site groups.