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J Clin Neurosci. 2013 May;20(5):750-2. doi: 10.1016/j.jocn.2012.03.051. Epub 2013 Jan 22.

Hemorrhagic epidermoid cyst in a patient with generalized tonic clonic seizure.

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  • 1Division of Neuroradiology, Department of Medical Imaging, St. Michael's Hospital, University of Toronto, 30 Bond St, Toronto, Ontario, M5B 1W8, Canada.


Epidermoid cysts account for approximately 1% of all intracranial tumors. Hemorrhage into an epidermoid cyst is extremely rare, and has only been reported a few times. To our knowledge, there are no reports of a hemorrhagic epidermoid cyst presenting with a first generalized tonic clonic seizure. We present a 68-year old female with an epidermoid cyst with intracystic hemorrhage who presented with a first time generalized tonic clonic seizure. When complicated with hemorrhage, the diagnosis of an epidermoid cyst is challenging and there is a potential for misdiagnosis.

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