Noticeably, in humans, the heterozygous mutation of the intronic enhancer at +9.9 kb, which corresponds to +9.5 kb in mice, has been found in patients with GATA-2 deficiency (MonoMAC syndrome) [18], which is characterized by a predisposition to myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML) [19–21]. The gene discussed is GATA2; the disease is acute myeloid leukemia.