Approximately 30% of patients who are candidates for bone marrow transplants do not have an
HLA-matched, or close to matched, donor available. For this reason, doctors have been testing
ways to make transplants from HLA-partially matched donors as safe and effective as
transplants from HLA-matched donors.
This study is being done to test the safety and the treatment results of a specific kind of
transplant. In this transplant, blood from two donors will be used. Each donor will share one
half of your HLA type. Blood from both donors will be transplanted at the same time.