Abstract
Neuromyelitis optica (NMO) is an inflammatory demyelinating disease of the central nervous system, characterized by repeatedly invading the brain, optic nerve, or spinal cord. In 2004, when a disease-specific antibody (aquaporin-4-immunoglobulin G) was discovered in the serum of an optic neuromyelitis patient, it was thought to be a separated disease from multiple sclerosis. Since 2004, however, the concept of the disease has been expanded to include NMO spectrum disorder (NMOSD). We experienced a rare case of NMOSD in a patient who presented with left visual disturbance and underwent endoscopic sinus surgery because of acute fungal sinusitis. We report this case with a review of the literature.
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