| Phenotype details |
never eye-tracking, never social smile; no speech, no two-word sentences; 2y-stable head and neck, 20m-rolling over, 3y-crawled; 2y-sitting alone, 4y-walked; intellectual disability; autistic features; 2.5m onset early infantile epileptic encephalopathy; no dysmorphology; no cardiac features; no motor/neurological findings; no involuntary movement; no skeletal anomalies; myopia; MRI brain normal |