On the contrary, not all SCN1A mutations lead to Dravet Syndrome, but several variants have been found in cases of familial febrile seizures (FS), genetic epilepsy with febrile seizures plus (GEFS+), epilepsy of infancy with migrating focal seizures (EIMFS), or familial hemiplegic migraine type 3 (FHM3) [12,13,14]. Here, SCN1A is linked to migraine, familial hemiplegic, 3.