Dramatic improvement of truncal tardive dystonia following globus pallidus pars interna deep brain stimulation.

Truncal predominant tardive dystonia is an uncommon presentation of dystonia, and may be associated with significant disability. We report a patient with near-complete resolution of severe, disabling truncal tardive dystonia following globus pallidus pars interna deep brain stimulation. Her unusual clinical presentation highlights the difficulties in diagnosing unusual forms of dystonia, and the therapeutic gains that can be achieved once the diagnosis is recognised.