Spontaneous motor cortex encephalocele presenting with simple partial seizures and progressive hemiparesis

Case report and review of the literature

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Several cases of congenital or acquired temporal encephaloceles have been reported in the literature as the causative mechanism of simple and/or complex partial seizures. In this report the authors describe a rare case of spontaneous parietal encephalocele presenting with simple partial seizures and progressively increasing contralateral upper-extremity motor deficit. The unusual anatomical location of an encephalocele associated with seizures and the delayed seizure onset represent distinctive characteristics in this case. Preoperative imaging included surface electroencephalography, computerized tomography, and brain magnetic resonance imaging. Frameless neuronavigation and intraoperative cortical mapping were used to aid resection of the encephalocele, and the dural and bone defects were reconstructed. The surgical outcome in this case was excellent, and the patient has remained seizure free. The pertinent literature is reviewed in this report.

Abbreviations used in this paper:CT = computerized tomography; MR = magnetic resonance.

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Address reprint requests to: Kostas N. Fountas, M.D., Ph.D., The Medical Center of Central Georgia, 840 Pine Street, Suite 880, Macon, Georgia 31201. email: knfountasmd@excite.com.

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