Uniprot Description A disease characterized by infantile-onset seizures, microcephaly, severe intellectual disability and delayed motor milestones with absent speech or only achieving a few words. Most patients also have behavioral problems with hyperactivity. Microcephaly is progressive and without neuronal migration or structural abnormalities, consistent with primary microcephaly.

Disease Ontology Description An early infantile epileptic encephalopathy characterized by microcephaly, infantile onset of seizures and developmental delay that has_material_basis_in homozygous or compound heterozygous mutation in the PNKP gene on chromosome 19q13.