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Neuropathological examination revealed progressive multifocal leukoencephalopathy (<jats:styled-content style=\"fixed-case\">PML<\/jats:styled-content>) involving the cerebellum and brainstem. The affected tissues displayed intense infiltrations by <jats:styled-content style=\"fixed-case\">CD8+ T<\/jats:styled-content>\u2010cells and microglia. <jats:styled-content style=\"fixed-case\">JC<\/jats:styled-content> virus was localized in oligodendroglia and cerebellar granule cells. This case illustrates unusual localization of inflammatory <jats:styled-content style=\"fixed-case\">PML<\/jats:styled-content> in a patient with <jats:styled-content style=\"fixed-case\">RA<\/jats:styled-content> treated with methotrexate.<\/jats:p>","DOI":"10.1111\/neup.12045","type":"journal-article","created":{"date-parts":[[2013,5,20]],"date-time":"2013-05-20T10:04:22Z","timestamp":1369044262000},"page":"39-44","source":"Crossref","is-referenced-by-count":7,"title":["Inflammatory infratentorial progressive multifocal leukoencephalopathy in a patient with rheumatoid arthritis"],"prefix":"10.1111","volume":"34","author":[{"given":"Boleslaw","family":"Lach","sequence":"first","affiliation":[{"name":"Department of Pathology &amp; Molecular Medicine McMaster University Hamilton Health Sciences Hamilton General Hospital (Neuropathology)  Hamilton Ontario 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