Pseudotumoural optic neuritis in myelin oligodendrocyte glycoprotein antibody-associated disease in children: Pseudotumoural optic neuritis in MOG antibody-associated disease.

Myelin oligodendrocyte glycoprotein (MOG) antibody-associated disease (MOGAD) is a neuro-inflammatory condition affecting adults and children. The presentations vary and include acute disseminated encephalomyelitis, optic neuritis or transverse myelitis. Optic neuritis associated with anti-MOG antibodies is typically bilateral, anterior and initially severe but usually resolves quickly and completely. Here, we describe 3 children with pseudotumoural optic neuritis associated with anti-MOG antibodies and their outcome. Recognizing these unusual presentations may reduce unnecessary work-ups and improve functional prognosis by implementing rapid and adequate treatment.