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Etiologic Factors for Unitemporal vs Bitemporal Epileptiform Discharges
S. H. Lim, MBBS, MRCP;
N. K. So, MBBChir, MRCP;
H. Lüders, MD, PhD;
H. H. Morris, MD;
J. Turnbull, MS
Arch Neurol. 1991;48(12):1225-1228.
Abstract
• We compared the etiologic factors and clinical characteristics of 30 patients with unitemporal vs those of 30 patients with bitemporal independent (minimum 20% from one side) interictal epileptiform discharges on extracranial electroencephalograms. Febrile seizures occurred significantly more frequently in the unitemporal (40%) than in the bitemporal (17%) group. Mass lesions were more common in the bitemporal group, and seven of 10 patients with mass lesions showed bitemporal interictal epileptiform discharges. There were no statistically significant differences in age at onset, frequency of seizures, duration of epilepsy, and history of central nervous system infection or trauma between the two groups. A history of febrile seizures or central nervous system infection that may be expected to cause diffuse cerebral injury does not appear to be the major factor predisposing to the development of bitemporal interictal epileptiform discharges.
Author Affiliations
From the Departments of Neurology, The Cleveland (Ohio) Clinic Foundation, Ohio (Drs Lüders, Morris, Lim, and So and Mr Turnbull); and Tan Tock Seng Hospital, Singapore (Dr Lim).
Footnotes
Accepted for publication August 19, 1991.
Presented at the meeting of the American Epilepsy Society, San Diego, Calif, November 1990.
Reprint requests to Department of Neurology, The Cleveland Clinic Foundation, 9500 Euclid Ave, Cleveland, OH 44195 (Dr So).
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