dystonia, idiopathic torsion

dystonia, idiopathic torsion A form of torsion dystonia that begins in childhood, around age 12. Symptoms typically start in one part of the body, usually in an arm or a leg, and eventually spread to the rest of the body within about 5 years. Early-onset torsion dystonia is not fatal, but it can be severely debilitating. Also known as generalized torsion dystonia. See also dystonia, torsion.