Gilles de la Tourette disorder among individuals with severe or profound mental retardation.

There have been limited reports on the incidence of Gilles de la Tourette disorder among individuals with mental retardation. Only three cases have been reported in people with severe or profound mental retardation. In this paper three additional case reports of people with severe or profound mental retardation and Tourette disorder were presented. Issues related to the diagnosis of Tourette disorder in this population were discussed.