GATA2 deficiency, caused by heterozygous mutation of GATA2, includes a group of diseases presented with monocytopenia, cellular immunodeficiency with marked susceptibility to infection (mycobacterial, fungal, and viral), myelodysplasia (MDS), leukemic transformation, vessel abnormalities, and deafness. This evidence concerns the gene GATA2 and Myelodysplasia.