title: [Progressive multifocal leukoencephalopathy].
mesh_terms: D001927:Brain Diseases / Q000453:epidemiology / Q000209:etiology* / Q000382:microbiology / Q000473:pathology; D003711:Demyelinating Diseases / Q000209:etiology; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D009461:Neurologic Manifestations; D027383:Papillomaviridae / Q000302:isolation & purification; D027382:Polyomaviridae; D012897:Slow Virus Diseases; D014777:Virus Diseases