PRRT2 and Familial paroxysmal ataxia: An array of mutations (e.g., non-sense, frameshift, missense) in the gene encoding proline-rich transmembrane protein 2 (PRRT2) are linked to a wide group of paroxysmal disorders, including paroxysmal kinesigenic dyskinesia (PKD), benign familial infantile seizures, infantile convulsions with choreoathetosis, and episodic ataxia (Gardiner et al., 2015).