Rett syndrome(redirected from Rett disorder)
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Rett syndrome[′ret ‚sin‚drōm]
An inherited developmental disorder observed only in females that is characterized by a short period of normal development, followed by loss of developmental skills (particularly purposeful hand movements) and marked psychomotor retardation. A brief autistic-like phase may be observed during the preschool period, but the subsequent course and clinical features are markedly different from autism.