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Department of Neurology and Neurosurgery, McGill University, and the Montreal Neurological Institute and Hospital, Montreal, Quebec, Canada.
Twenty patients with small, indolent, relatively inaccessible posterior temporal or extratemporal lesions had complex partial seizures presumably related to anterior and inferomesial temporal lobe epileptic activity. All underwent anterior temporal corticectomies, and in six the resection was extended at a second operation. There was sclerosis of mesial temporal structures in seven of the surgical specimens. Two patients became seizure free for more than 2 years; three others showed more than 95% reduction in seizure frequency, and five had moderate (>50%) reduction. While cessation of seizures or improved control may occur following this surgical strategy, the results are strikingly inferior to those obtained when the lesion, as well as the epileptogenic area, can be resected. Review of this group of patients suggests that the lesion should be included in the resection if at all possible.
Address correspondence and reprint requests to Dr. Frederick Andermann, Montreal Neurological Institute and Hospital, 3801 University Street, Montreal, PQ, Canada H3A 2B4.
Presented in part at the American Epilepsy Society Meeting, Boston, MA, December 1989.
Received February 8, 1991. Accepted for publication in final form April 19, 1991.
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