Dr. David Fajgenbaum has accomplished something few physicians ever experience: he helped discover a treatment that ultimately saved his own life while creating new hope for patients around the world.
A physician-scientist specializing in immunology and rare diseases, Dr. Fajgenbaum serves on the faculty of the Perelman School of Medicine at the University of Pennsylvania. His career changed dramatically after he was diagnosed with Castleman disease, a rare and potentially fatal immune disorder that nearly claimed his life multiple times while he was still in medical training.
Rather than allowing the diagnosis to define him, Dr. Fajgenbaum dedicated himself to understanding the disease at a molecular level. Working alongside researchers and clinicians, he identified existing medications that could be repurposed to treat his condition, leading to a therapy that placed his disease into long-term remission.
His experience inspired him to establish the Castleman Disease Collaborative Network, a nonprofit organization that has united researchers, physicians, and patients from around the world to accelerate scientific discovery. The organization has dramatically expanded research into Castleman disease while creating a collaborative model now studied by other rare disease communities.
In recent years, Dr. Fajgenbaum has also become a leading advocate for drug repurposing—the practice of finding new medical uses for existing medications. Because these drugs have already undergone extensive safety testing, they can often reach patients more quickly than entirely new therapies.
His laboratory combines artificial intelligence, molecular biology, and clinical research to identify promising treatments for rare diseases, inflammatory disorders, and immune-related conditions. This innovative approach has attracted widespread recognition throughout academic medicine.
Dr. Fajgenbaum is also the bestselling author of Chasing My Cure, a memoir describing his remarkable journey from critically ill patient to physician-scientist. His story has inspired healthcare professionals and patients alike, demonstrating the extraordinary impact determination and scientific curiosity can have on advancing medicine.
Today, Dr. David Fajgenbaum continues to lead groundbreaking research while advocating for faster collaboration across the medical community. His work offers hope to thousands of patients with rare diseases and highlights the remarkable possibilities that emerge when personal experience fuels scientific innovation.
