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Detailed histopathological study of a biopsy specimen from the involved regions resulted in a diagnosis of progressive multifocal leukoencephalopathy (PML). This case illustrates that an akinetic\u2010rigid syndrome may be a rare presentation of PML. HIV\u2010related PML may have unusual radiological features. Brain biopsy may be necessary to confirm PML in cases associated with atypical clinical and radiological presentations.<\/jats:p>","DOI":"10.1002\/mds.870080120","type":"journal-article","created":{"date-parts":[[2004,12,31]],"date-time":"2004-12-31T10:06:12Z","timestamp":1104487572000},"page":"113-116","source":"Crossref","is-referenced-by-count":32,"title":["Akinetic\u2010rigid syndrome in a 13\u2010year\u2010old girl with HIV\u2010related progressive multifocal leukoencephalopathy"],"prefix":"10.1002","volume":"8","author":[{"given":"Carlos","family":"Singer","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joseph R.","family":"Berger","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brian C.","family":"Bowen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jocelyn H.","family":"Bruce","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"William J.","family":"Weiner","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2004,10,12]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0733-8619(18)31105-8"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1002\/ana.410170407"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.7326\/0003-4819-107-1-78"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/0046-8177(91)90293-X"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0404.1988.tb03661.x"},{"key":"e_1_2_1_7_2","first-page":"503","volume-title":"Handbook of clinical neurology. 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