Developmental and Epileptic Encephalopathy 6b, also known as dee6b, is related to scn1a seizure disorders and megalencephaly, autosomal dominant. An important gene associated with Developmental and Epileptic Encephalopathy 6b is SCN1A (Sodium Voltage-Gated Channel Alpha Subunit 1). Affiliated tissues include brain and eye, and related phenotypes are hypotonia and global developmental delay