Abstract
Bone marrow transplantation has become well established in the treatment of malignant disorders. High-dose chemotherapy with hematopoietic stem cell support is widely used for most hematological malignancies, as well as for some solid tumors. In the light of recent developments in blood progenitor cell harvest, these have been clinical trials with autologous and allogeneic transplants. In particular, the availability of large numbers of blood stem cells, mobilized by granulocyte colony-stimulating factor and collected by leukapheresis, has made it possible to overcome histocompatibility barriers in HLA-mismatched leukemia patients. Other recent developments include new methods for blood progenitor cells mobilization and ex vivo expansion, the use of umbilical cord blood as an alternative source of stem cells, and molecular techniques that may, in the future, provide other modalities of purging tumor cells from autologous grafts.
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