{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,13]],"date-time":"2026-02-13T09:05:47Z","timestamp":1770973547749,"version":"3.50.1"},"reference-count":16,"publisher":"FapUNIFESP (SciELO)","issue":"4a","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Arq. Neuro-Psiquiatr."],"published-print":{"date-parts":[[2007,12]]},"abstract":"<jats:p>Arachnoid cysts (AC) are extra-cerebral cerebrospinal fluid collections of unknown origin. They correspond to 1% of all intracranial nontraumatic space-occupying lesions and appear more frequently in the middle fossa (50%). More than 25% of these cysts are incidental findings and the majority of patients are asymptomatic. Seizures, intracranial hypertension signs, neurological deficits, macrocrania, developmental delay and bulging of the skull are the main signs and symptoms of the lesion. AC rupture and bleeding are rare, usually occurring in young adults and associated with trauma. The risk of hemorrhage does not exceed 0.04% \/ year. We describe the case of a ten-year-old boy who presented with acute signs of intracranial hypertension secondary to a spontaneous acute subdural hematoma, contralateral to an AC of the middle fossa. Three factors were significant in this case: signs and symptoms occurred spontaneously; the presence of an acute subdural hematoma exclusively contralateral to the AC; successful outcome of the conservative treatment.<\/jats:p>","DOI":"10.1590\/s0004-282x2007000600025","type":"journal-article","created":{"date-parts":[[2007,12,12]],"date-time":"2007-12-12T17:02:49Z","timestamp":1197478969000},"page":"1034-1036","source":"Crossref","is-referenced-by-count":16,"title":["Spontaneous acute subdural hematoma contralateral to an arachnoid cyst"],"prefix":"10.1590","volume":"65","author":[{"given":"Jos\u00e9 Gilberto de Brito","family":"Henriques","sequence":"first","affiliation":[{"name":"Federal University of Minas Gerais; Mater Dei Hospital"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Geraldo","family":"Pianetti Filho","sequence":"additional","affiliation":[{"name":"Federal University of Minas Gerais"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Karina Santos Wandeck","family":"Henriques","sequence":"additional","affiliation":[{"name":"Hospital Mater Dei; Belo Horizonte Hospital"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Luiz Fernando","family":"Fonseca","sequence":"additional","affiliation":[{"name":"FHEMIG; Hospital Mater Dei"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Renato Pacheco de","family":"Melo","sequence":"additional","affiliation":[{"name":"S\u00e3o Vicente Hospital; S\u00e3o Jos\u00e9 Hospital"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M\u00e1rcia Cristina da","family":"Silva","sequence":"additional","affiliation":[{"name":"Jo\u00e3o XXIII Hospital; S\u00e3o Camilo Hospital"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jos\u00e9 Augusto","family":"Malheiros","sequence":"additional","affiliation":[{"name":"Federal University of Minas 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