Developmental and Epileptic Encephalopathy 34, also known as epileptic encephalopathy, early infantile, 34, is related to slc12a5-related epilepsy of infancy with migrating focal seizures and temporal lobe neoplasm. An important gene associated with Developmental and Epileptic Encephalopathy 34 is SLC12A5 (Solute Carrier Family 12 Member 5), and among its related pathways/superpathways is Signal transduction_JNK pathway. Affiliated tissues include brain, and related phenotypes are intellectual disability and seizure