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Schizotypal Personality Disorder

Schizotypal personality disorder (SPD) is a disorder characterized by extensive social and interpersonal deficits. It is one of several personality disorders, all of them defined by distressing or impairing inner experiences and behaviors that are pervasive and enduring and occur in several contexts. This entry reviews the diagnostic criteria, clinical presentation, comorbidities, onset and course, and etiology of SPD and discusses the association of SPD to the schizophrenia spectrum, as well as existing treatments.

Diagnostic Criteria

All personality disorders are categorically divided by the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), into three separate branches or “clusters” (Clusters A, B, and C). SPD is classified under Cluster A, “odd and eccentric behavior,” grouped together with paranoid personality disorder and schizoid personality disorder. These disorders ...

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