MONDO_0013620 (congenital myasthenic syndrome 16) is any congenital myasthenic syndrome in which the cause of the disease is a mutation in the SCN4A gene. Also known as: CMS16, SCN4A congenital myasthenic syndrome, congenital myasthenic syndrome acetazolamide-responsive, congenital myasthenic syndrome caused by mutation in SCN4A, congenital myasthenic syndrome type 16, myasthenic syndrome, congenital, type 16.