Abstract
BACKGROUND: Paroxysmal kinesigenic dyskinesia (PKD) is a rare condition associated with heterozygous mutations in the proline-rich transmembrane protein 2 (PRRT2) gene. PHENOMENOLOGY SHOWN: In this article we illustrate the phenomenology of PKD in a male previously misdiagnosed with Tourette's syndrome. EDUCATIONAL VALUE: Regardless of the underlying phenotype, PKD is highly responsive to some antiepileptic drugs.