When David Fajgenbaum was in medical school, he became stricken with a rare autoimmune disease that nearly killed him. Though he recovered, he would suffer recurring, life-threatening flares only to discover the poor state of research into condition. Fajgenbaum chronicles his rare disease journey and his efforts to drive research and find treatments in his new book “Chasing My Cure: A Doctor’s Race to Turn Hope into Action.” Fajgenbaum, who is executive director of the Castleman Disease Collaborative Network, will be featured at this year’s Global Genes Rare Patient Advocacy Summit, which begins in San Diego September 18. Ahead of the summit, we spoke to him about his experience as a rare disease patient, his efforts to find treatments for his conditions, and how his innovative approach to developing a patient-driven research agenda has provided a roadmap for other rare disease organization to follow suit.