Tourette's syndrome in Monroe County school children.

We examined children from Monroe County, New York, to establish the prevalence of Gilles de la Tourette's syndrome (TS) in the county's schools. Patients were recruited for free evaluations from physicians, other health professionals, school personnel, and through extensive coverage in the local news media. Forty-one TS patients were detected among the 142,636 pupils enrolled in the county's public and private schools at the time of the study (estimated prevalence, 28.7 per 100,000). Twenty patients had obsessive-compulsive symptoms, but only three had an impairing, diagnosable disorder. Fifty-six percent had a positive family history for TS or tics. Eighteen needed pharmacotherapy, although, for most, TS was a mild disorder requiring no drug treatment.