It is believed that autoimmune Th1 T-cells specific for encephalitogenic myelin antigens, including myelin basic protein (MBP), proteolipid protein (PLP) and myelin oligodendrocyte glycoprotein (MOG) play a major role in the pathogenesis of MS, irrespective of the initial triggering event [2]. Here, MBP is linked to myeloid sarcoma.