All of the following are features of Devic's syndrome (neuromyelitis optica), except?
Devic's disease is a variant of multiple sclerosis. Fulminant demyelinating process is seen with another variant called Marburg's variant.
Separate attacks of acute optic neuritis and myelitis
Optic neuritis is either unilateral or bilateral
Brain MRI is typically normal
It has a fulminant demyelinating process and progress to death in 1-2 year