Dystonia 4, Torsion, Autosomal Dominant, also known as dyt4, is related to leukodystrophy, hypomyelinating, 6 and torsion dystonia 4, and has symptoms including torticollis and dystonia, limb. An important gene associated with Dystonia 4, Torsion, Autosomal Dominant is TUBB4A (Tubulin Beta 4A Class IVa). Affiliated tissues include tongue and cerebellum, and related phenotypes are dysphonia and generalized dystonia