Ancestry of 28 umbilical cord blood (UCB) transplant recipients at Memorial Sloan-Kettering Cancer Center 10/1/05-8/7/07.
 Patients were offered UCB transplantation if allogeneic transplantation was indicated and no suitably matched related or unrelated volunteer donor was available (n = 26). Although potential 10/10 matched unrelated volunteer donors were identified for both of the 2 patients of Northwestern European ancestry, they each received UCB due to transplantation urgency (n = 1) and patient preference (n = 1). UCB units were 4-6/6 HLA-matched at A and B antigens and DRB1 alleles.