| Phenotype details |
see paper; ..., severe developmental delay, no speech yet, no head support; 14d-focal, myoclonic seizures; MRI cortical atrophy, deep Sylvian fissures, mild ventriculomegaly, prominent basal ganglia, hypoplastic corpus callosum, retrocerebellar and bitemporal arachnoid cysts; intracranial calcifications; hypotonia, dystonia, brisk reflexes, nystagmus; microcephaly; small for gestational age; congenital heart defect; optic atrophy |