PRRT2 and episodic kinesigenic dyskinesia 1: First, pathogenic variants in PRRT2 were found in individuals and families with paroxysmal kinesigenic dyskinesia (PKD, OMIM#128200) [1], soon followed by reports showing that the same variants in PRRT2 also cause self-limiting sporadic and familial infantile epilepsy (traditional terminology: benign sporadic and familial seizures, BFIS, OMIM#605751) [2], known as Watanabe epilepsy, and the overlapping disorder of paroxysmal kinesigenic dyskinesia with infantile convulsions (PKD/IC, OMIM#602066) [3,4].