Concurrent myasthenia gravis and neuromyelitis optica spectrum disorder: a rare intersection of autoimmune pathologies.

This case report describes a woman in her 50s with a rare coexistence of neuromyelitis optica spectrum disorder (NMOSD) and myasthenia gravis (MG), highlighting the diagnostic challenges and therapeutic considerations. Initially diagnosed with acetylcholine receptor antibody-positive MG, she later developed progressive visual impairment, leading to a diagnosis of NMOSD. Rituximab treatment was effective in managing both conditions, demonstrating the benefits of targeted therapies in reducing complications related to polypharmacy. This case underscores the importance of clinical vigilance and a multidisciplinary approach in managing overlapping autoimmune disorders, offering insights into their inter-relationships and therapeutic strategies.