Familial Paroxysmal Nonkinesigenic Dyskinesia, also known as paroxysmal nonkinesigenic dyskinesia, is related to segmental dystonia and hemidystonia, and has symptoms including torticollis, dystonia, paroxysmal and myokymia. An important gene associated with Familial Paroxysmal Nonkinesigenic Dyskinesia is PNKD (PNKD Metallo-Beta-Lactamase Domain Containing). Affiliated tissues include globus pallidus and spinal cord, and related phenotypes are dystonia and paroxysmal dyskinesia