| Phenotype details |
birth weight 2200g; 4y weight 29.5kg (SD+1), OFC 44.7cm (SD-6); microcephaly, sloping forehead, hypertelorism, upslanting palpebral fissures, large ears; hearing loss, abnormal auditory evoked potentials; no congenital heart defect; ocular cataracts, clinically blind; profound psychomotor developmental delay; 3y-no head control; not sitting; not walking; no speech; severe developmental delay/intellectual disability; dystonic tetraparesis; initially truncal hypotonia; hypertonia; axial hypotonia; no nystagmus; ; difficult social contact; epileptic spasms during first year of life, myoclonic and tonic seizures; 27m-MRI-brain diffuse lobar hypoplasia, thin grey matter and simplified gyration, large ventricles, preserved U-fibres, delayed myelination, reduction of the bulk white matter, thin corpus callosum, hypoplastic cerebral peduncles |