seizures, benign familial infantile, 5 (MONDO_0014903) is any benign familial infantile epilepsy in which the cause of the disease is a mutation in the SCN8A gene. Also known as: BFIS5, SCN8A benign familial infantile epilepsy, benign familial infantile epilepsy caused by mutation in SCN8A, seizures, benign familial infantile, 5; BFIS5, seizures, benign familial infantile, type 5.