A significantly higher percentage of Foxp3+ γδ T cells in the CD3+ T cell population (median: 6.7% vs. 4.2%, P = 0.007) and Foxp3+ Vδ1 in the γδ T cell population (median: 4.7% vs. 2.0%, P = 0.030) was found in AML patients. This evidence concerns the gene FOXP3 and acute myeloid leukemia.