| Phenotype details |
The patients had global developmental delay, hand and foot tremors, and spasticity. The older brother could walk with support. Both had increased deep tendon reflexes. The older brother had prominent cortical sulci and widened sylvian fissures; the younger brother had agenesis of the corpus callosum, cerebellar vermis hypoplasia, and defective myelination. The older brother had borderline intelligence. |