Inclusion Criteria:  We included in our study all pediatric patients who underwent genetic analysis with the epilepsy-intellectual disability gene panel between June 2019 and May 2021. All of these patients were either epileptic or had intellectual disability, or both, of undetermined or genetic presumed etiology.  Exclusion Criteria:  We excluded i) patients older than 18 years, ii) those for whom the indication for genetic analysis was not epilepsy or intellectual disability iii) patients not followed up at the Regional University Hospital Center of Nancy, France.