<prompt> All of the following are features of Devics syndrome neuromyelitis optica, except?Separate attacks of acute optic neuritis and myelitisOptic neuritis is either unilateral or bilateralBrain MRI is typically normalIt has a fulminant demyelinating process and progress to death in 1-2 year  <response>: Devics disease is a variant of multiple sclerosis. Fulminant demyelinating process is seen with another variant called Marburgs variant. 