Gilles de la Tourette syndrome and mania in an adolescent.

The case is presented of a twelve-year-old boy suffering simultaneously from Tourette Syndrome (TS) and a manic episode. The problems of this unique clinical association are discussed from the point of view of differential diagnosis, treatment, and possible biochemical basis. The case also illustrates the usefulness of the expanded concept of TS as a neuropsychiatric disorder with dysregulation of perceptual, motor, and cognitive functioning.