has material basis in autosomal dominant disease developmental and epileptic encephalopathy 65 A developmental and epileptic encephalopathy characterized by onset in the first months to years of life of various types of intractable seizures, severe to profound psychomotor developmental delay, and mild facial dysmorphism that has_material_basis_in heterozygous mutation in the CYFIP2 gene on chromosome 5q33. MIM:618008 disease_ontology DEE65 DOID:0080430 early infantile epileptic encephalopathy 65 developmental and epileptic encephalopathy autosomal dominant inheritance