CHD2 and Epileptic encephalopathy: Most patients experience multiple seizure types, including drop attacks, absences, myoclonic seizures, and photosensitivity associated with generalized spike-wave on EEG.1 Several prominent features of the CHD2‐myoclonic encephalopathy phenotype such as seizure type and sensitivity overlap with other developmental and epileptic encephalopathies (DEEs) including myoclonic‐atonic epilepsy, Lennox-Gastaut syndrome, West syndrome, and Jeavons syndrome.