In an allogeneic transplant, the patient gets bone marrow/stem cell or cord blood cells from a donor. The donor's tissue type (HLA type) must closely match the patient's. The donor can be either related or unrelated. Related donors are usually a brother or sister, but only 25% of all patients usually find a match in their family, or find a donor from their community. This means 75%, an overwhelming majority, will need to find an unrelated donor. BoneMarrowTest.com can help with finding an unrelated bone marrow/stem cell or cord blood donor.