title: Capgras' syndrome: the delusion of substitution.
abstract: The English and French literature on Capgras' syndrome yielded 315 patients, 212 of whom provided the basis for review. Forty-six percent presented with an affective disturbance. Seven variant forms of a unified delusion of substitution are described: Capgras; subjective doubles, Capgras type; Fregoli; intermetamorphosis; subjective doubles, autoscopic type; "reverse" subjective doubles; and "reverse" Fregoli. Classes of single and multiple forms of the delusion with either functional or organic etiology were compared. Multiple form classes had a greater diversity of variant forms.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002194:Capgras Syndrome / Q000145:classification / Q000175:diagnosis* / Q000523:psychology; D002648:Child; D003702:Delusions / Q000175:diagnosis / Q000523:psychology; D003861:Depersonalization / Q000175:diagnosis / Q000523:psychology; D005260:Female; D005602:France; D006801:Humans; D008297:Male; D008875:Middle Aged; D019965:Neurocognitive Disorders / Q000175:diagnosis / Q000523:psychology; D011618:Psychotic Disorders / Q000175:diagnosis*; D006113:United Kingdom