Neuromyelitis optica (NMO) and its limited forms known
as NMO spectrum disorders (NMOSD) are characterized by
severe optic neuritis (ON) and/or longitudinally extensive
transverse myelitis1
, and some brain lesions are also unique
to NMOSD. Historically, Giovanni Battista Pescetto reported
the first description suggestive of NMO in 18442
, but it was
only in 1894 that Eugène Devic and his student Fernand
Gault first used the term neuromyelitis optica (neuromyélite
optique3
). Interestingly, more than half of the patients