Common and uncommon imaging findings in progressive multifocal leukoencephalopathy (PML) with differential diagnostic considerations.

To provide a practical review of the spectrum of possible imaging findings in patients with progressive multifocal leukoencephalopathy (PML) and to address differentials.PML manifests with a broad spectrum of imaging features. Besides knowledge of preferential location, extent, temporal course, enhancement, results of functional imaging and clinical setting, recognition of imaging findings reflecting active demyelination may help the clinician in appropriately narrowing down the differential diagnosis.