OMG and viral encephalitis: <h4>Objectives</h4>This study reported a case of overlapping anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis and myelin oligodendrocyte glycoprotein (MOG) inflammatory demyelinating disease with human herpesviruses 7 (HHV-7) infection.<h4>Methods</h4>The detailed clinical characteristics, neuroimaging features, and outcomes of the patient were collected.