Essential tremor and dystonia.

We reviewed the database of the Dystonia Clinic at the University of Kansas Medical Center for patients with dystonia and tremor. Of 296 patients with idiopathic dystonia, 24 had dystonic tremor, 20 with cervical dystonia had an isolated head-nodding tremor, two patients with writer's cramp had ipsilateral hand tremor, and two patients with generalized dystonia had arm tremor. Eight patients, all with cervical dystonia, had essential tremor that preceded the onset of their dystonia.