The autism-fragile-X syndrome (AFRAX): a population-based study of ten boys.

This study reports on the neuropsychiatric findings in a population-based series of ten infantile autistic boys, aged 2-17 years, who also showed the fragile-X (q27) chromosome marker. Epilepsy, brainstem dysfunction and a range of psychiatric symptoms not inherent in the autism diagnosis were present. Theoretical and practical issues are discussed.