The psychiatric phenotype in triple X syndrome: New hypotheses illustrated in two cases
Number of pages
SourceDevelopmental Neurorehabilitation, 15, 3, (2012), pp. 233-238
Article / Letter to editor
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SW OZ BSI OLO
SubjectLearning and Plasticity
Background: Triple X syndrome (47, XXX or trisomy X) is a relatively frequent cytogenetic condition with a large variety of physical and behavioural phenotypes. Method: Two adult patients with a triple X karyotype are described. Results: Their karyotype was unknown until some years ago. What these patients have in common is that they were diagnosed with a broader autism phenotype, they were sexually abused, they suffer from psychotic illness and they show challenging behaviour, suicidality and a decline in occupational capacity. Discussion: These gene-environment interactions are discussed. Gene-environment interactions may explain the variety of behavioural and psychiatric phenotypes in triple X syndrome. Ongoing atypical development in adults is hypothesized. Conclusions: Gene-environment interactions and ongoing atypical development in adults should be taken into account in research concerning the psychiatric phenotype of developmental disorders, especially those involving triple X syndrome.
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