Speech-induced lingual dystonia.

Federal University of São Paulo, São Paulo SP, Brazil: Department of Neurology and Neurosurgery; Interdisciplinary Clinical Neurosciences Laboratory; Department of Psychiatry. Dystonia can be classified according to its etiology as primary, dystonia-plus, secondary, heredodegenerative, and psychogenic. Pure lingual dystonia is rare but not uncommon in association with other cranial dystonia. However, in clinical practice, even after excluding the main secondary causes of dystonia, the differential diagnosis between primary versus psychogenic forms may be tricky. There are few cases in the literature describing speech-induced lingual dystonia and they were mostly classified as idiopathic. We report a case of a woman who presented with a speech-induced lingual dystonia and discuss the differential diagnosis and potential therapeutic options of this condition.