seizures, benign familial neonatal, 1 true Benign familial neonatal seizures (BFNS) is a condition characterized by recurrent seizures in newborn babies. The seizures begin around day 3 of life and usually go away within 1 to 4 months. The seizures can involve only one side of the brain (focal seizures) or both sides (generalized seizures). Many infants with this condition have generalized tonic-clonic seizures (also known as grand mal seizures). This type of seizure involves both sides of the brain and affects the entire body, causing muscle rigidity, convulsions, and loss of consciousness. benign neonatal seizures caused by mutation in KCNQ2 epilepsy, benign neonatal, 1, and/or myokymia benign familial neonatal seizure UMLS:C3149074 MESH:C567743 BFNS1 KCNQ2 benign neonatal seizures https://www.ncbi.nlm.nih.gov/pubmed/30782577 seizures, benign familial neonatal, 1, and/or myokymia MONDO:0007365 seizures, benign familial neonatal, 1 Any benign neonatal seizures in which the cause of the disease is a mutation in the KCNQ2 gene. seizures, benign familial neonatal, 1; BFNS1 seizures, benign familial neonatal, type 1 OMIM:121200 benign neonatal seizures