title: Our evolving understanding of progressive multifocal leukoencephalopathy.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001921:Brain / Q000382:microbiology / Q000473:pathology; D005260:Female; D006801:Humans; D007968:Leukoencephalopathy, Progressive Multifocal / Q000150:complications* / Q000453:epidemiology / Q000382:microbiology / Q000473:pathology; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D009369:Neoplasms / Q000150:complications*; D027383:Papillomaviridae / Q000302:isolation & purification; D027382:Polyomaviridae