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  • Title: Childhood ganglioglioma and medically intractable epilepsy. A clinicopathological study of 15 patients and a review of the literature.
    Author: Khajavi K, Comair YG, Prayson RA, Wyllie E, Palmer J, Estes ML, Hahn JF.
    Journal: Pediatr Neurosurg; 1995; 22(4):181-8. PubMed ID: 7619718.
    Abstract:
    Gangliogliomas are an increasingly recognized cause of epilepsy in children. Several studies have shown that early surgical treatment is beneficial, but controversy exists regarding the type of surgical treatment required for optimal seizure control and to prevent tumor recurrence. To address this issue, we performed a retrospective review of 15 children operated on at the Cleveland Clinic during a 7-year period with medically intractable epilepsy who were found to harbor a ganglioglioma during the course of their work-up. Nine patients with mostly nondominant hemisphere tumors underwent tumor resection without the use of electrocorticography to guide additional resection of epileptogenic foci, while 6 other patients with dominant hemisphere tumors had subdural electrode grids placed to extraoperatively map zones of ictal onset and eloquent areas. The extent of tumor resection was then correlated to seizure outcome and tumor recurrence. Of the 11 patients who received a gross total resection, 9 are seizure-free while 2 have a greater than 90% reduction in their seizure frequency (100% 'good' outcome). There was no tumor recurrence in this group. Of the 4 patients who underwent a subtotal tumor resection, 1 is seizure-free while 3 have persistent seizures (25% 'good' outcome). All patients in this group have stable disease on follow-up magnetic resonance imaging. In those patients who received subdural electrode grids, the extent of resection of the zones of ictal onset did not correlate with seizure outcome. The mean follow-up was 42 months. We conclude that complete tumor resection is the most important factor for optimal seizure control and to prevent tumor recurrence.
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