MOG and myeloid sarcoma: Although the primary events leading to the autoimmune attack characterizing MS are not yet established, a possible explanation is based on molecular mimicry consisting of the activation of autoreactive T lymphocytes through cross-reactivity by viral and/or bacterial antigens structurally similar to central nervous system (CNS) proteins, such as myelin basic protein (MBP), myelin oligodendrocyte glycoprotein (MOG) and proteolipid protein (PLP) (229).