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Published:
Apr 8, 2024Keywords:
Huge arachnoidal cyst onset of seizure adult brain imaging
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Huge arachnoidal cyst with recent onset of seizure in an adult
Abstract
A 68-year-old right-handed man, having consulted for the occurrence of a first epileptic seizure. Brain computerized tomography (CT) scan and magnetic resonance imaging (MRI) showed a giant congenital supratentorial arachnoidal cyst occupying the anterior two-thirds of the right hemisphere, measuring 14.09x6.07 (APxT) cm and 11.67 cm high, compressing the right cerebral hemisphere and the right cerebral peduncle with a midline shift. Arachnoidal cysts are congenital malformations containing cerebrospinal fluid. They may be asymptomatic and discovered incidentally on imaging. When they are large, as in this patient, they can cause a mass effect.
