| Phenotype details |
Severe ID (no social interaction or speech), severe hypotonia, epilepsy/focal seizures. Thin corpus callossum, cerebellar atrophy, increased cerebrospinal fluid spaces, visual impairment (pathological VEP), PEG feeding. Normal serum alkaline phosphatase levels. Appearance: Microcephaly (OFC −4SD), round face, low anterior hairline, broad nasal bridge, high-arched palate, small chin, slender feet and hirsutism. Scoliosis. Dry skin, peeling on feet. |