(60) examined these 6 MLL rearrangements; MLL-AF4, MLL-AF10, MLL-ENL, MLL, AF9, MLL-AF6, MLL-AF10, which are the most common among them, and MLL-GAS7, which constitute about 60% of all acute leukemia harboring MLL rearrangement. The gene discussed is KMT2A; the disease is acute leukemia.