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Anteromesial Temporal Lobectomy for Medically Intractable Temporal Lobe Epilepsy: An Operative Study
Published on: August 15, 2025
Surgery in temporal lobe epilepsy patients without cranial MRI lateralization
Y B Gomceli1, A Erdem, E Bilir
1Ministry of Health Ankara Training and Research Hospital, Department of Neurology, Ankara, Turkey. yasemingomceli@hotmail.com
Acta Neurologica Belgica
|June 17, 2006
Summary
Epilepsy surgery can be successful even with normal or unclear MRI findings in intractable temporal lobe epilepsy patients. Detailed evaluations, including invasive monitoring, help identify the epileptogenic focus for successful surgical outcomes.
Area of Science:
- Neurosurgery
- Epileptology
- Neuroradiology
Background:
- High-resolution MRI is crucial for evaluating intractable temporal lobe epilepsy (TLE) preoperatively.
- Morphologic abnormalities on MRI typically indicate the epileptogenic focus.
- Surgery may be an option for TLE patients with normal MRI or bilateral hippocampal atrophy if the focus is determined.
Observation:
- Seventy-three patients with temporal epileptogenic foci underwent anterior temporal lobectomy.
- Twelve patients (16.4%) had no localizing structural lesion on cranial MRI (6 normal, 6 bilateral hippocampal atrophy).
- These 12 patients underwent comprehensive presurgical evaluations, including scalp video-EEG, MRI, neuropsychological tests, and Wada test; 5 required invasive monitoring.
Findings:
- All 12 patients with no MRI lesion achieved successful surgical outcomes.
- Nine patients (75%) were classified as Engel's Class I (seizure-free).
- Three patients (25%) were classified as Engel's Class II, with one having psychiatric comorbidities and another with independent frontal lobe epilepsy.
Implications:
- Epilepsy surgery is a viable option for TLE patients even without clear MRI lateralizing or localizing lesions.
- Detailed presurgical evaluations, including invasive monitoring, are essential for identifying the epileptogenic focus in challenging cases.
- These findings support surgical intervention for selected TLE patients with non-localizing MRI findings, improving seizure control and quality of life.
