SCN1B and Febrile seizure (within the age range of 3 months to 6 years): Several monoallelic variants in SCN1B have been associated with febrile seizures, febrile seizures plus, GEFS+, early-onset absence epilepsy, and focal epilepsy including temporal lobe epilepsy (TLE), and patients who experience sudden unexpected death from epilepsy (SUDEP) (Table 2).