UCB–recipient ABO compatibility was analyzed in a nonmalignant UCBT population.
Two hundred seventy patients, mostly pediatric, with various primary diagnoses were studied.
ABO compatibility does not impact post-transplant RBC transfusion burden.
Graft failure, donor chimerism, GVHD, and other UCBT outcomes were also unaffected.
ABO compatibility should not be a major criterion for UCB selection for NMD.