This syndrome is characterized by the onset of seizures between 3 and 20 months of age (peak 6 months). Seizures may be frequent at onset but usually remit within 1 year from the onset. In untreated cases there can be isolated or brief clusters of seizures within the period from onset to remission. A minority of individuals may have epilepsy in later life. Some patients (with PRRT2 mutations) may develop paroxysmal kinesiogenic dyskinesia in later life. The disease is self-limited familial infantile epilepsy (MONDO_0100024). Also known as: SeLFIE, self-limited familial and non-familial infantile seizures.