Among these PRRT2-associated disorders, a majority of patients have benign familial infantile epilepsy (BFIE), characterized by self-limiting seizures, which usually onset before the age of 6 months, and normal psychomotor development (1), paroxysmal kinesigenic dyskinesia (PKD), characterized by short attacks of dyskinesia triggered by sudden voluntary movements (2), or infantile convulsions with choreoathetosis (ICCA), presenting paroxysmal movement disorders during childhood after remission of infantile convulsions (3). This evidence concerns the gene PRRT2 and benign familial infantile epilepsy.