The average age of dystonia onset seems earlier (5.0 years) when compared to other monogenic primary dystonia: 12 years in DYT-TOR1A, 14.0 years in DYT-THAP1 and 31 years in DYT-GNAL (Blanchard et al., 2011; Ozelius and Bressman, 2011; Fuchs et al., 2013), this may be a clue to the underlying genetic diagnosis. The gene discussed is THAP1; the disease is Dystonia.