KIR B haplotype donors confer a reduced risk of relapse after haploidentical transplantation in children with acute lymphoblastic leukemia.
We analyzed the influence of donor killer-cell immunoglobulin-like receptor (KIR) gene haplotypes on the risk of relapse and probability of event-free survival (EFS) in children with acute lymphoblastic leukemia (ALL) who received HLA-haploidentical transplantation of ex vivo T-cell depleted peripheral blood stem cells. The KIR gene haplotype was evaluated in 85 donors and the KIR B-content score