Abstract
We describe four patients who experienced optic neuritis (ON) and seizures and were found to have antibodies to myelin oligodendrocyte glycoprotein (MOG) in serum. The index case was a previously healthy 39-year-old man who developed steroid dependent ON and had a generalized seizure when steroids were tapered. He tested positive for antibodies to MOG. We have reviewed the charts of all 11 anti-MOG antibody positive patients in our practice and found that 4 patients, all of whom had experienced one or more episodes of ON, also had a generalized seizure during the course of their illness. In 2 patients – including the index case - seizure occurred during steroid taper and in 2 others at the time of an episode of acute disseminated encephalomyelitis (ADEM). Association of anti-MOG antibodies and relapsing demyelinating disorders of the central nervous system is increasingly recognized. Testing for anti-MOG antibodies should be considered in patients with optic neuritis and seizures, especially in those with who also have a history of ADEM.
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