Myelin oligodendrocyte glycoprotein (MOG) antibody-associated disease (MOGAD) is a recently recognized demyelinating disease of the central nervous system (CNS) with a broad clinical spectrum, which includes optic neuritis (ON), transverse myelitis (TM), brainstem syndrome, acute disseminated encephalomyelitis (ADEM) [1], as well as encephalitis and seizures [2]. The gene discussed is MOG; the disease is optic neuritis.