Jarius et al. propose the possible diagnostic criteria for “MOG encephalomyelitis” in adult patients, as including MOG antibody seropositive patients with either a monophasic or relapsing ON, TM, brainstem encephalitis, or encephalitis (or a combination of these syndromes), if MRI or electrophysiological findings are compatible with CNS demyelination (25). The gene discussed is MOG; the disease is viral encephalitis.