NCMP-08. EFFICACY OF ANTIEPILEPTIC DRUGS IN GLIOMA PATIENTS WITH EPILEPSY: A SYSTEMATIC REVIEW
Abstract BACKGROUND Epilepsy is a common symptom in glioma patients, requiring antiepileptic drug (AED) treatment. However, comprehensive data on the efficacy and tolerability of AED treatment is currently lacking. In this systematic review we specifically assessed the efficacy of AEDs in patients with a grade II-IV glioma. METHODS Electronic databases PubMed/MEDLINE, EMBASE, Web of Science, and Cochrane library were searched up to April 2020. Three different outcomes were extracted from all eligible articles: (I) seizure freedom; (II) ≥50% reduction in seizure frequency; and (III) treatment failure. To overcome variation with respect to sample sizes, weighted averages (WA) were calculated for outcomes at 6 and 12 months. RESULT A total of 64 studies were included. For monotherapy, the 6-months seizure freedom rate was highest for phenytoin (WA=72%), whereas the 12-months seizure freedom rate was highest for pregabalin (WA=75%). For achieving ≥ 50% seizure reduction, levetiracetam was the most effective AED at 6 and 12 months, with WA of 82 and 97% respectively. Considering the provided polytherapy combinations, levetiracetam combined with phenytoin was most effective followed by levetiracetam with valproic acid. Seizure freedom rates with polytherapy at 6 months and 12 months were highest for combinations with phenytoin and topiramate, respectively. For achieving a ≥ 50% seizure reduction, combinations with perampanel were found to be the most effective at 6 and 12 months. CONCLUSION Based on the current literature, phenytoin, levetiracetam and pregabalin are most effective as AED monotherapy in glioma patients with epilepsy. Well-controlled prospective studies are needed to help further guide clinician’s treatment choices.