The cumulative incidence of grades II, III or IV acute GvHD at 180 days was similar in patients receiving grafts from donors that were homozygous for the LAG3 rs870849 C allele (34.9%), heterozygous CT (32.5%) or homozygous for the T allele (33.8%) (univariate analysis showing p: 0.829 and multivariate analysis p: 0.768). This evidence concerns the gene LAG3 and acute graft versus host disease.