A rare primary torsion dystonia characterized by focal or segmental dystonia with onset either in the cranial-cervical region or in the upper limbs. Age of onset varies between 5 years and adulthood, with a mean age of onset of 16 years. Clinical manifestations are generally mild and slowly progressive.
Other condition names
Primary dystonia with mixed phenotype
Primary torsion dystonia with predominant craniocervical or upper limb onset