PMID: 16636514Apr 26, 2006Paper

Temporal lobe epilepsy caused by dermoid cyst

Neurologia Medico-chirurgica
Hidenori SuganoKimiko Tamagawa

Abstract

A 15-year-old boy presented with a dermoid cyst in the left temporal lobe manifesting as complex partial seizures. Magnetic resonance imaging demonstrated a tumor with mixed signal intensity in the left anterior temporal subdural area, but no evidence of rupture. Intraoperatively, the tumor was located mainly in the deep sylvian fissure, adjacent to the amygdala, and had compressed the hippocampus. Intraoperative electrocorticography (ECoG) showed sporadic interictal spikes in both the adjacent areas of the tumor and over the anterior segment of the hippocampus. Total removal of the tumor and gliotic area of the surrounding tissue including the amygdala was performed. The hippocampal epileptic region was treated by transection of the pyramidal layer to preserve verbal memory function. Histological examination showed the dermoid tumor was closely attached to the brain parenchyma. The complex partial seizures ceased completely after surgery. Intraoperative recording of ECoG from the hippocampus and other limbic structures was very important to determine the epileptogenic area even if the tumor did not directly invade the hippocampus.

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Citations

Nov 22, 2008·Applied Neuropsychology·Robin BhatiaJames A Akinwunmi
Aug 2, 2011·Neuropathology : Official Journal of the Japanese Society of Neuropathology·Tetsuya HiraishiAkiyoshi Kakita
Mar 18, 2009·Acta neurochirurgica·Hasan KocaeliMehmet Savran
Feb 9, 2017·The Journal of Craniofacial Surgery·Gökhan Kuran, Demet Yazici
Jul 2, 2018·Child's Nervous System : ChNS : Official Journal of the International Society for Pediatric Neurosurgery·Syed Hassan A AkbariJennifer M Strahle

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