Neuromyelitis optica: atipic clinic presentation.

We present a patient with neuromyelitis optica who exhibited longitudinally extensive transverse myelitis and aquaporin-4 IgG positivity. Patient did not have optic neuritis clinically, but we detected it with examination of visual evoked potentials (prolonged P100 wave latans), subclinically. We argue that neuromyelitis optica may also be considered in elderly patients with isolated involvement of the longitudinally extensive transverse myelitis, and visually evoked potential evaluation is important to determine of subclinic optic neuritis and anti-AQP-4 is also important to support to determination.