One-third to one-half of people with<unk>  die in the first few months following diagnosis, depending on the severity of their underlying disease. Survivors can be left with variable degrees of neurological disability.
Progressive multifocal leukoencephalopathy
Toxic leukoencephalopathy
Tuberculous meningitis
Granulomatous meningoencephalitis
Herpesviral encephalitis
Malignant multiple sclerosis
Drug-induced aseptic meningitis
Polioencephalitis