Arrow points the area of perivascular infiltration and asterisks mark the parenchymal swelling. Mind magnetic resonance imaging (MRI) showed considerable T2 hyperintense and gadolinium-enhancing periventricular and corpus callosum lesions. Serum aquaporin 4 antibody was positive 1:10,000 (normal value G, heteroplasmy 37%). At age 19, patient was also diagnosed with neuromyelitis optica spectrum disorder (NMOSD) after […]