developmental and epileptic encephalopathy 89 (DOID:0112223)
Alliance: disease page
Synonyms: DEE89; early infantile epileptic encephalopathy 89
Alt IDs: OMIM:619124
Definition: A developmental and epileptic encephalopathy characterized by onset in the first days or months of life of seizures, profound global developmental delay with impaired intellectual development, absent speech, axial hypotonia, and spastic quadriparesis that has_material_basis_in homozygous or compound heterozygous mutation in the GAD1 gene on chromosome 2q31.1.