Elizabeth (Betsy) K. O’Donnell, MD, received her medical degree from Vanderbilt University. She completed her residency in internal medicine at Beth Israel Deaconess Medical Center where she served an additional year as a Chief Resident. She completed her fellowship in hematology and oncology at the Dana-Farber Cancer Institute. She is the Director of Early Detection and Prevention at Dana-Farber and an Associate Professor of Medicine at Harvard Medical School. She specializes in the evaluation and treatment of precursor plasma cell disorders including Monoclonal Gammopathy of Undetermined Significance (MGUS) and smoldering myeloma and is leading the clinical program for multi-cancer early detection. O’Donnell has a particular interest in lifestyle medicine including diet and exercise.