Incidence of interattack asymptomatic brain lesions in NMO spectrum disorder.

Asymptomatic brain lesions are rarely observed on conventional MRI in clinically stable AQP4 antibody-seropositive patients with NMOSD after immunosuppressive therapy and brain MRI lesions characteristic of NMOSD are not seen in the relapse-free period. These findings may provide further insight regarding currently known diagnostic and disease-monitoring strategies in NMOSD.