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Lumbar puncture established a normal cerebrospinal fluid protein and glucose, with seven white cells \u00d710<jats:sup>6<\/jats:sup>\/L. Subsequent investigations identified evidence of a recent <jats:italic>Epstein\u2013Bar virus<\/jats:italic>, in keeping with a post-infectious acute cerebellar ataxia syndrome. Following treatment with intravenous methylprednisolone, symptoms resolved gradually over months. While post-infectious acute cerebellar ataxia is rare in adults, it is an important cause of an acute presentation of ataxia that should be recognised by paediatric and adult physicians.<\/jats:p>","DOI":"10.1136\/bcr-2024-262043","type":"journal-article","created":{"date-parts":[[2025,1,27]],"date-time":"2025-01-27T12:11:02Z","timestamp":1737979862000},"page":"e262043","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Post-infectious acute cerebellar ataxia in a young adult"],"prefix":"10.1136","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2014-8654","authenticated-orcid":false,"given":"Tal Jonatan","family":"Koren","sequence":"first","affiliation":[{"name":"Royal Prince Alfred Hospital Department of Neurology and Stroke, Camperdown, New South Wales, Australia"},{"name":"The University of Sydney Brain and Mind Centre, Camperdown, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Matthew C","family":"Kiernan","sequence":"additional","affiliation":[{"name":"Institute of Neurological Sciences, Prince of Wales Hospital and the University of New South Wales, Randwick, Sydney, New South Wales, Australia"},{"name":"Neuroscience Research Australia, Randwick, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2025,1,27]]},"reference":[{"key":"2025082712233769000_18.1.e262043.1","doi-asserted-by":"crossref","first-page":"184","DOI":"10.1590\/0004-282x20190020","article-title":"Acute cerebellar ataxia: differential diagnosis and clinical approach","volume":"77","author":"Pedroso","year":"2018","journal-title":"Arq Neuro-Psiquiatr"},{"key":"2025082712233769000_18.1.e262043.2","article-title":"Post-Infectious Acute Cerebellar Ataxia Treatment, a Case Report and Review of Literature","volume":"10","author":"Del Giudice","year":"2023","journal-title":"Children (Basel)"},{"key":"2025082712233769000_18.1.e262043.3","doi-asserted-by":"crossref","first-page":"617","DOI":"10.1177\/08830738221093209","article-title":"Postinfectious Acute Cerebellar Syndromes in Children: A Nationally Ascertained Case Series From Australia 2013-2018","volume":"37","author":"Gunaratna","year":"2022","journal-title":"J Child Neurol"},{"doi-asserted-by":"publisher","key":"2025082712233769000_18.1.e262043.4","DOI":"10.1177\/0883073820901407"},{"doi-asserted-by":"publisher","key":"2025082712233769000_18.1.e262043.5","DOI":"10.1177\/0883073812450318"},{"key":"2025082712233769000_18.1.e262043.6","doi-asserted-by":"crossref","DOI":"10.12659\/AJCR.918567","article-title":"Post-Epstein-Barr Virus Acute Cerebellitis in an Adult","volume":"21","author":"Al-Shokri","year":"2020","journal-title":"Am J Case Rep"},{"doi-asserted-by":"crossref","unstructured":"Ali K , Lawthom C . 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