David C. Fajgenbaum, MD, MBA, MSc, FCPP, of the Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, discusses his journey from caregiver, oncologist, patient, researcher and advocate connector. Additionally, Dr Fajgenbaum outlines his experience with idiopathic multicenter Castleman disease and the development of the Castleman Disease Collaborative Network. This interview was recorded via an online conference call with The Video Journal of Oncology (VJOncology).