In addition to gene mutations of SCN1A that can cause DS, other genes include PCDH19, SCN2A, SCN8A, SCN1B, GABRA1, GABRG2, GABRB3, STXBP1, HCN1, CHD2, and KCNA2 can also cause DS or DS-like phenotypes (4). Here, SCN8A is linked to Dravet syndrome.