Probabilities of survival for 170 patients receiving bone marrow transplants for Wiskott-Aldrich syndrome by donor type and age.

There was not a significant difference in the risk of mortality after HLA-matched sibling transplants and after unrelated donor transplants in children younger than 5 years. Significantly worse survival was associated with use of related donors other than HLA-identical siblings, regardless of recipient age, and with use of unrelated donors in patients over 5 years of age.