| Phenotype details |
developmental delay, microcephaly, hypotonia; 11m-unassisted sitting; 30m-walking; assisted walking; functional hand use; no speech; no stereotypic movements; no dyskinesia; hypotonia; no spasticity; strabism; no nystagmus; abnormal sleep patterns; good social interaction; good eye contact; no unexplained episodes of crying; 34m-onset epileptic seizures; seizures; febrile seizures; good antiepileptic treatment response; no feeding difficulties; no gastroesophageal reflux; no aspiration; no constipation; no hypersalivation; bruxism; no abnormal breathing patterns; no kyphoscoliosis or scoliosis |