| Phenotype details |
6m-onset seizures, no clinical seizures; profound developmental delay, GMFCS V, CFCS V, MiniMACS V; profound hypotonia, cortical visual impairment, nystagmus; EEG history hypsarrhythmia, mild background slowing, focal spikes and polyspikes; MRI brain abnormal diffusion restriction attributed to vigabatrin toxicity, delayed myelination, mild enlargement of ventricles, small corpus callosum |