Definition of "leukoencephalitis" []

• Inflammation of the white matter of the brain (noun)

WordNet. Princeton University. 2010.

• "A study released in March in the medical journal Blood linked Rituxan to 57 cases of progressive multifocal leukoencephalitis, or PML, between 1997 and 2008."
• "Present in 70\% to 90\% of human beings, the virus, once activated, inflames the white matter of the brain - a condition known as progressive multifocal leukoencephalitis (PML) - which has no cure and is almost always fatal."
• "A brain biopsy and a spinal tap confirmed the diagnosis of a swiftly moving and often fatal viral brain infection called progressive multifocal leukoencephalitis (PML) that attacks the brain's white matter."