developmental and epileptic encephalopathy 94 (Experimental Factor Ontology entry EFO_0020000) can be described as follows. Developmental and epileptic encephalopathy-94 (DEE94) is a severe form of epilepsy characterized by onset of multiple seizure types in the first few years of life and associated with poor prognosis. Affected individuals have cognitive regression and impaired intellectual development (summary by Carvill et al., 2013). Also known as: CHD2-Related Neurodevelopmental Disorders, DEE94, Epileptic encephalopathy, childhood-onset.