title: Progressive multifocal leukoencephalopathy.
mesh_terms: D000368:Aged; D002561:Cerebrovascular Disorders / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D007945:Leukemia, Lymphoid / Q000150:complications; D007968:Leukoencephalopathy, Progressive Multifocal / Q000175:diagnosis* / Q000209:etiology / Q000473:pathology; D008297:Male