Article
Surgical treatment of drug resistant temporal lobe epilepsy due to hippocampal sclerosis: results in a consecutive series of 139 patients with long-term follow-up
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Published: | June 2, 2015 |
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Objective: We reviewed a consecutive series of 139 patients operated upon in our Institute for drug resistant temporal lobe epilepsy (TLE) due to hippocampal sclerosis, between 1999 and 2008: all patients were followed up for at least 5 years (mean duration of follow-up 9.1 years, range 5-15).
Patients' age ranged from 11 to 62 years with a mean age of 36 years. There were 57 males and 82 males. Age at onset of seizures ranged from 1 to 48 years with a mean of 13 years. Epilepsy duration at the time of surgery ranged from 2 to 49 years with a mean of 23 years. All patients were selected for surgery after a non-invasive diagnostic work-up, including high-field (1,5 or 3 Tesla) MRI, long-term video-EEG monitoring, neuropsychological and psychiatric assessment.
Anterior temporal lobectomy was carried out by the last author (V.E.) in all cases. Post-operative complications consisted of 1 case of hemiparesis and 2 cases of transient dysphasia. Up to the last follow-up visit, 99 patients were in Engel class 1A, 7 patients were in class 1B, 9 were in class 1C, 9 were in class 1D, 3 were in class 2A, 4 were in class 2B, 7 were class 3A and 1 in Class 4A: thus, 89% (124/139) of patients were in Engel Class 1 after a mean follow-up of 9.1 years.
In our experience, appropriate selection of patients (without the need for invasive EEG studies) and subpial surgical technique lead to optimal surgical outcomes in terms of morbidity and long-term control of seizures.
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