| Phenotype details |
7m-opisthotonic posture, developmental delay; 5y-diffuse irregular spike-and-slow-wave complex; 5y-focal seizure (tonic upgaze), tonic seizure; severe chorea, athetosis; seizure control intractabl (several times per day); no head control; not sitting; no speech; MRI 1y3m-delayed myelination, 4y8m-reduced cerebral white matter, thin corpus callosum |