SHARED DELUSIONS OF DOUBLES

This is the first report of two partners in a folie a deux situation m anifesting identical Capgras delusions. It is postulated that the Capg ras syndrome developed as a result of interaction between a dominant p atient with primarily paranoid psychopathology and a submissive one wi th primarily organic dysfunction. The submissive ''neuro-organic'' par tner experienced a non-delusional misidentification that acquired a de lusional component and developed into the Capgras syndrome as a result of elaboration by the dominant paranoid partner, who subsequently ''i mposed'' the Capgras delusion on the submissive partner. The submissiv e patient, and, to a lesser extent the dominant patient, had evidence of organic cerebral dysfunction.