Absence of the fragile X CGG trinucleotide repeat expansion in girls diagnosed with a pervasive developmental disorder.

Abstract excerpt

The purpose of this study was to determine the prevalence of the fragile X (FRAX) CGG trinucleotide expansion in a population of young girls (n = 45) diagnosed with pervasive developmental disorder (PDD). Their mean age was 43.7 months (range, 25 to 132 months). Diagnoses included autistic disorder (n = 20), PDD (n = 23), and Asperger's syndrome (n = 2). Molecular FRAX testing was performed on all patients by...

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