Inclusion Criteria:  Patients followed from 2013 to 2021 at the reference center for rare epilepsies with a diagnosis of tuberous sclerosis of Bourneville (based on Roach criteria and/or pathogenic variant identified in TSC1 or TSC2) Start of follow-up at the reference center for rare epilepsies before the age of 4 months Absence of epileptic seizures observed by relatives or on video EEG until inclusion  Exclusion Criteria:  objection from their legal representatives Antiepileptic treatment before or at the time of study entry Seizure occurrence prior to the inclusion visit