CT and MRI of multifocal PML in a 46-year-old patient with HIV infection

Multifocal PML in 46-year-old patient with HIV.
(A) Non-contrast head CT shows focal hypodensity in subcortical white matter of left inferior parietal lobule (arrow).
Axial (B) and coronal (C) FLAIR MRI shows additional lesions in the ventrolateral thalamus (arrowhead) and splenium of the corpus callosum (thick arrows). Note extent of subcortical white matter lesion (arrow) on coronal FLAIR MRI.
(D) Axial post-contrast T1-weighted MRI shows no contrast-enhancement.