Progressive multifocal leukoencephalopathy laboratory tests

Overview
Tests may include:


 * Brain biopsy (rare)
 * Cerebrospinal fluid test for the JCV
 * CT scan of the brain
 * Electroencephalogram (EEG)
 * MRI of the brain

Lab test
PML is diagnosed by testing for JC virus DNA in cerebrospinal fluid or in a brain biopsy specimen.