Inborn errors of metabolism: biotinidase deficiency and other organic aciduria, phenylketonuria, mitochondrial disorders, Menkes disease, nonketotic hyperglycinemia, and antiquitin deficiency
Genetic
Genetic: CDKL-5, MeCP 2, ARX, STXBP-1, SPTAN1, and PLC-β1
Chromosomal disorders: down syndrome, 1p36 deletion, and Pallister-Killian syndrome