A bone marrow transplant is a medical procedure performed to replace bone marrow that has been damaged or destroyed by disease, infection, or chemotherapy. This procedure involves transplanting blood stem cells, which travel to the bone marrow where they produce new blood cells and promote growth of new marrow.
Bone marrow is the spongy material in the center of the bones that makes all types of blood cells, including young blood cells called stem cells. In BMT, stem cells are filtered, and then put back into the same child. Or they are put into another sick child. These stem cells will grow and become new and healthy bone marrow. Transplanted stem cells are called the graft.