Dr. Borowitz is Professor of Pathology and Oncology at the Johns Hopkins University School of Medicine. He obtained his MD and PhD degrees at Duke University, and after completing a residency in Anatomic and Clinical Pathology he joined the faculty there until coming to Johns Hopkins in 1993. At Johns Hopkins he serves as the Executive Vice Chair of the Pathology Department, and as the Laboratory Director of the Johns Hopkins Hospital Laboratories. He also directs the Division of Hematopathology and the Flow Cytometry Laboratory. He has had a long interest in the application of new technology, especially flow cytometry, to the diagnosis of leukemia and lymphoma, resulting in the publication of more than 200 original articles, review articles, book chapters, and practice guidelines and standards. His particular of area of expertise is acute lymphoid leukemia in childhood. For more than 30 years his laboratory has served as a reference laboratory for the Children’s Oncology Group, and for the last 17 has been engaged in studies using flow cytometry to detect minimal residual disease in children with ALL. He has received more than 100 invitations to present his research work, or to teach in courses on leukemia or flow cytometry. In addition to his work in COG, he is a member of a number of professional societies among which is the International Clinical Cytometry Society, where he has taught an annual course for more than 20 years, and served previously as an officer for eight years.