Aquaporin-4-IgG-positive neuromyelitis optica spectrum disorder (AQP4+NMOSD) and myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD) are rare, antibody-mediated inflammatory disorders of the central nervous system (CNS). Although historically grouped under the umbrella of multiple sclerosis, both entities differ markedly in pathophysiology, clinical course, prognosis and therapeutic requirements. The identification of disease-specific autoantibodies has not only refined diagn...