| Phenotype details |
severe intellectual disability; no speech; not walking; no epilepsy; no autistic features; no microcephaly; no macrocephaly; MRI brain ventriculomegaly and increased T2 signal in white matter, thin corpus callosum; hypotonic; no congenitial malformations; no cardiac malformations; no urogenitory abnormalities; no apneas, no hypoventilation |