Diagnostic Yield From 339 Epilepsy Patients Screened on a Clinical Gene Panel

We identified 87 variants in 30 different genes that could explain disease, of which 54% were not previously reported. This study confirms the utility of targeted gene panel analysis in epilepsy and highlights several factors to improve the yield of diagnostic genetic testing, including the critical need for clinical phenotype information and parental samples, microarray analysis for whole exon deletions and duplications, and frequent update of panels to incorporate new disease genes.