Thus, the current study aimed at determining the gene expression of T-bet and GATA-3 and their ratio by PBMCs obtained from newly-diagnosed patients with MS following the in vitro stimulation with Myelin Oligodendrocyte Glycoprotein (MOG), Phytohemagglutinin (PHA), or without stimulation to identify any associations. The gene discussed is GATA3; the disease is myeloid sarcoma.