Positively correlated microRNAs included miR-25, miR-106b, miR-146a, miR-146b, miR-155, miR-181a-1, miR-181a-2, miR-181b-1, miR-181b-2, miR-181c, miR-181d, etc. MiR-25 was found to be overexpressed in the c-kit subgroup and involved in leukemogenesis in pediatric AML. This evidence concerns the gene KIT and acute myeloid leukemia.