Lennox-Gastaut syndrome (LGS) is a developmental epileptic encephalopathy (DEE) that has multiple causes and an incidence of approximately two cases per 100 000 population [1]. The disorder is characterized by several seizure types, severe cognitive impairment, and an specific electroencephalogram (EEG) pattern showing a slow spike- wave complexes (<2.5 Hz) and generalized paroxysmal fast activity (10Hz) during sleep [2]. Seizures usually begin to occur before the age of 8 years and persist into adulthood in more than 90% of patients [3–5]
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