AQP4 antibody-seropositive neuromyelitis optica spectrum disorder in a patient with mixed connective tissue disease: a case report

Only a few anecdotal cases of the coexistence between NMOSD and MCTD have so far been described, and many clinical aspects of this association are not yet fully known. Missed diagnosis of rheumatologic or neurologic diseases may lead to treatment delay and, potentially, irreversible disability. Closer collaboration between neurologists and rheumatologists is needed for the early diagnosis of both diseases.