Limit duration of immunosuppression
HIV/AIDS patients, antiretroviral therapy is key
Cidofovir may be useful in non-AIDS patients
HIV/AIDS patients, antiretroviral therapy is key
Progressive multifocal leukoencephalopathy
Hypoxic encephalopathy
Primary CNS lymphoma
Acute toxic-metabolic encephalopathy 
Drug induced aseptic meningitis
Hypoglycemia
Japanese encephalitis
Hyperosmolar state 