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  • Title: Cognitive behavioral therapy in 22q11.2 microdeletion with psychotic symptoms: What do we learn from schizophrenia?
    Author: Demily C, Franck N.
    Journal: Eur J Med Genet; 2016 Nov; 59(11):596-603. PubMed ID: 27639442.
    Abstract:
    The 22q11.2 deletion syndrome (22q11.2DS) is one of the most common microdeletion syndromes, with a widely underestimated prevalence between 1 per 2000 and 1 per 6000. Since childhood, patients with 22q11.2DS are described as having difficulties to initiate and maintain peer relationships. This lack of social skills has been linked to attention deficits/hyperactivity disorder, anxiety and depression. A high incidence of psychosis and positive symptoms is observed in patients with 22q11.2DS and remains correlated with poor social functioning, anxiety and depressive symptoms. Because 22q11.2DS and schizophrenia share several major clinical features, 22q11.2DS is sometimes considered as a genetic model for schizophrenia. Surprisingly, almost no study suggests the use of cognitive and behavioral therapy (CBT) in this indication. We reviewed what should be learned from schizophrenia to develop specific intervention for 22q11.2DS. In our opinion, the first step of CBT approach in 22q11.2DS with psychotic symptoms is to identify precisely which tools can be used among the already available ones. Cognitive behavioral therapy (CBT) targets integrated disorders, i.e. reasoning biases and behavior disorders. In 22q11.2DS, CBT-targeted behavior disorders may take the form of social avoidance and withdrawal or, in the contrary, a more unusual disinhibition and aggressiveness. In our experience, other negative symptoms observed in 22q11.2DS, such as motivation deficit or anhedonia, may also be reduced by CBT. Controlled trials have been studying the benefits of CBT in schizophrenia and several meta-analyses proved its effectiveness. Therefore, it is legitimate to propose this tool in 22q11.2DS, considering symptoms similarities. Overall, CBT is the most effective psychosocial intervention on psychotic symptoms and remains a relevant complement to pharmacological treatments such as antipsychotics.
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