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.
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.
Content last reviewed: 2026-06