Dramatic increase in number of SCD patients undergoing HCT. In data courtesy of the Center for International Blood and Marrow Transplantation, the annual number of transplants for SCD has quadrupled in the last decade of available data. The data presented here are preliminary and were obtained from the Coordinating Center of the Center for International Blood and Marrow Transplant Research. The analysis has not been reviewed or approved by the Statistical or Scientific Committees of the CIBMTR. No., number.