The mixed lineage leukemia (MLL) gene, located on the long arm of chromosome 11, region 2, band 3 (11q23), which is fused to a variety of translocation partner genes (TPG), is known to identify 135 different MLL rearrangements, and its rearrangements produce MLL fusion proteins can cause abnormal self-renewal and epigenetic deregulation of hematopoietic progenitor cells, leading to the development of malignant leukemia [1]. Here, KMT2A is linked to leukemia.