In the Haferlach et al. dataset [25], the expression of the following HOXA genes was higher in the cancerous samples compared to the healthy controls: (i) HOXA5 in AML (fold change = 2.52) and pro-B ALL (fold change = 4.36); (ii) HOXA6 expression in pro-B ALL (fold change = 2.01); (iii) HOXA7 expression in AML (fold change = 2.03); (iv) HOXA9 expression in AML (fold change = 2.99) and pro-B ALL (fold change = 7.21); and (v) HOXA10 expression in AML (fold change = 2.17) and pro-B ALL (fold change = 4.80). This evidence concerns the gene HOXA9 and acute lymphoblastic leukemia.