Serological and CSF immunological testing for Myelin Oligodendrocyte Glycoprotein (MOG)-IgG and Neuromyelitis Optica (NMO)-IgG, performed to definitively exclude specific demyelinating disorders such as MOG antibody disease (MOGAD) and NMO Spectrum Disorder (NMOSD), was negative. This evidence concerns the gene MOG and neuromyelitis optica.