Dr. Castillo was born in Peru, received his medical degree in Mexico City, and completed his Internal Medicine and Hematology & Oncology training at the University of Massachusetts and Brown University, respectively. Dr. Castillo is an Associate Professor at Harvard Medical School and serves as the Clinical Director of the Bing Center for Waldenström Macroglobulinemia at the Dana-Farber Cancer Institute. Dr. Castillo is also the principal investigator in a series of innovative clinical trials evaluating highly effective non-chemotherapeutic approaches for patients with Waldenström macroglobulinemia. Dr. Castillo is a member of the NCCN Committee for Myeloma, Amyloidosis and Waldenström Macroglobulinemia. He has authored more than 275 peer-reviewed articles and has published his research in the New England Journal of Medicine, Lancet Oncology, Journal of Clinical Oncology and Blood.