It may affect any part of the brain or even the spinal cord, optic nerve and compact white matter. Clinical manifestations are indefinite, and include headache, seizures, visual disturbances, corticospinal tract deficits, lethargy, and dementia. A case of<unk>  presenting as rapidly progressive dementia and Parkinson's disease like symptoms has been described in an 82-year-old woman.
Gliomatosis cerebri
Polioencephalitis
Meningism
Hypertensive leukoencephalopathy
Posterior reversible encephalopathy syndrome
Lymphocytic meningoradiculitis
Brain abscess
Autoimmune encephalitis