Developmental and Epileptic Encephalopathy 18, also known as epileptic encephalopathy, early infantile, 18, is related to developmental and epileptic encephalopathy 1 and early infantile epileptic encephalopathy, and has symptoms including absence seizures An important gene associated with Developmental and Epileptic Encephalopathy 18 is SZT2 (SZT2 Subunit Of KICSTOR Complex). Affiliated tissues include brain, and related phenotypes are hypotonia and profound global developmental delay