Characterization of neuromyelitis optica and neuromyelitis optica spectrum disorder patients with a late onset.

The article characterizes late onset of neuromyelitis optica (LONMO) and late onset of neuromyelitis optica spectrum disease (LONMOSD) and examines their predictive factors of disability and death. Both LONMO and LONMOSD are defined by an optic neuritis/longitudinally extensive transverse myelitis with aquaporin-4 antibodies (AQP4-Ab).