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Computed tomography and magnetic resonance imaging of the brain revealed subdural haematoma in the left fronto\u2013temporo\u2013parietal region, without subarachnoid haemorrhage. Digital subtraction angiography showed an aneurysm measuring \u22645\u2009mm in diameter, arising from the distal region of the left middle cerebral artery. During hospitalization, an acute change in mental status accompanied by slurred speech and narcolepsy prompted an emergency CT scan. This revealed an enlargement of the subdural haematoma. The patient underwent an emergency craniotomy, during which a large amount of bloody fluid was evacuated, and the aneurysm was coagulated and resected. The patient had a good outcome without neurological deficit. The incidence, mechanisms and treatment of this condition are discussed.<\/jats:p>","DOI":"10.1177\/0300060514524929","type":"journal-article","created":{"date-parts":[[2014,4,2]],"date-time":"2014-04-02T00:06:20Z","timestamp":1396397180000},"page":"870-878","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":32,"title":["Pure subdural haematoma caused by rupture of middle cerebral artery aneurysm: Case report and literature review"],"prefix":"10.1177","volume":"42","author":[{"given":"Jie","family":"Gong","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Zhejiang Hospital, Hangzhou, Zhejiang Province, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hu","family":"Sun","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Zhejiang Hospital, Hangzhou, Zhejiang Province, 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