Tissue inside the bones, responsible for the production of blood cells (red blood cells, leukocytes and platelets). It can be affected by some infections, such as tuberculosis, and by some types of cancer, such as leukemias, multiple myeloma and other hematological malignancies.
The cells that make up the bone marrow can be aspirated from one individual and infused into another, a situation known as an allogeneic transplant. In other cases, these cells can be removed from a patient and infused into that same patient, a situation known as an autologous transplant.
To learn more about bone marrow transplantation, see the Frequently Asked Questions – Bone Marrow Transplantation section.