| Phenotype details |
born at term, uneventful pregnancy; birth weight/height/head circumference normal; mild developmental delay10m-crawling, 18m walking; 18m myoclonic epilepsy; 4y brain MRI normal, ECG generalized spike/(poly)spike waves discharges; 7y difficulty speech/language/walking, no pyramidal and cerebellar syndromes; 12y never seizure-free (1 every 10d; 19y minor facial dysmorphy, dental anomalies, strabismus, down turned corners mouth |