{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T10:56:13Z","timestamp":1791975373435,"version":"4.4.0"},"reference-count":28,"publisher":"S. Karger AG","issue":"3","license":[{"start":{"date-parts":[[2019,1,1]],"date-time":"2019-01-01T00:00:00Z","timestamp":1546300800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"},{"start":{"date-parts":[[2019,1,1]],"date-time":"2019-01-01T00:00:00Z","timestamp":1546300800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Psychopathology"],"published-print":{"date-parts":[[2019]]},"abstract":"<jats:p>&lt;b&gt;&lt;i&gt;Background:&lt;\/i&gt;&lt;\/b&gt; Capgras\u2019 delusion has captured psychiatrists\u2019 imaginations, but the clinical features of the delusion have rarely been studied and presented systematically. &lt;b&gt;&lt;i&gt;Aims:&lt;\/i&gt;&lt;\/b&gt; The present study systematically reviews all case reports on Capgras\u2019 delusion in the English language in order to better understand differences between organic and functional aetiologies. &lt;b&gt;&lt;i&gt;Methods:&lt;\/i&gt;&lt;\/b&gt; All medical and psychiatric databases were searched, as were the bibliographies of published case reports, narrative reviews, and book chapters. &lt;b&gt;&lt;i&gt;Results:&lt;\/i&gt;&lt;\/b&gt; A total of 258 cases were identified from 175 papers. Functional Capgras\u2019 delusion was more associated with a wider variety of imposters; multiple imposters; other misidentification syndromes; auditory hallucinations; other delusions; and formal thought disorder. Organic cases were associated with age; inanimate objects; memory and visual-spatial impairments; right hemispheric dysfunction; and visual hallucinations. Executive dysfunction and aggression were associated with both types. &lt;b&gt;&lt;i&gt;Conclusions:&lt;\/i&gt;&lt;\/b&gt; Specific features of the \u00adCapgras\u2019 delusional content and associated signs point to either organic or functional aetiology. 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