Delusional Misidentification Syndromes

  title={Delusional Misidentification Syndromes},
  author={J. Arturo Silva and Gregory B. Leong and Alexander L. Miller},
  journal={CNS Drugs},
SummaryDelusional misidentification syndromes (DMSs) involve the delusional mis-identification of the physical and/or psychological identity of the self or others. DMSs always exist in association with a specific mental disorder.The treatment of DMSs usually follows the treatment of the underlying mental disorder. From an aetiological standpoint, DMSs may be grouped as being associated with either a functional psychosis or a psychotic disorder secondary to a general medical condition… 
Dangerousness and Management of Delusional Misidentification Syndrome
It is suggested that the degree of threat perceived by the patient from the delusionally misidentified object is the most important factor in determining the patient’s response to the delusions.
The masks of identities: who's who? Delusional misidentification syndromes.
Each of the different syndromes in definition and presentation is reviewed, as well as the field's attempts at classifying them, to describe their role in forensic psychiatry, particularly in regard to their potential as a marker of a particular subpopulation or of illness severity and their consideration in risk assessments of violence.
What is Capgras Syndrome? Diagnosis and Treatment Approach
Clinicians in Capgras syndrome should always be mindful of the risk of aggression and homicide in CS, and specific questions and interventions may assist clinicians in successfully identifying patients with CS.
Capgras delusion in postpartum psychosis: a case report
This case describes the temporal sequence of various psychopathologies during Postpartum Psychosis including Capgras delusion, a 26-year-old Nepalese woman who presented to the emergency for abnormal behavior on her 9th postpartum day.
Delusional misidentification and aggression in Alzheimer's disease.
The association of delusional misidentification and aggression in an individual suffering from Alzheimer's disease is explored.
A case of Cotard's syndrome associated with self-starvation.
The psychiatric-legal issues involving a case of Cotard's syndrome associated with self-starvation associated with nihilistic delusions are highlighted.
Capgras syndrome associated with limbic encephalitis in a patient with diffuse large B-cell lymphoma
The case of a patient with insidious onset and slowly progressive cognitive impairment, behavioral symptoms, temporal lobe seizures and delusional thoughts typical of delusional misidentification syndromes, who died of septic shock following a nosocomial respiratory infection is reported.
The prevalence of Capgras syndrome in a university hospital setting
The results of this study indicate that Capgras syndrome is not a rare syndrome, and commonly occurs during the course of either functional or organic psychotic illness, and age seems to be an important predicting factor for the etiology of psychosis underlying Cap gras syndrome.
Letters to the Editor
The long-term beneficial effects of gabapentin are reported in psychiatric patients who need adjunctive anticonvulsant therapy and!or benzodiazepines and for those who have a primary or comorbid anxiety disorder.


Delusional misidentification syndromes.
By stressing a symptom-based approach it is possible to examine psychiatric, neurological and medical cases as arising from the same underlying disturbance in cognition function.
Dangerousness of the delusional misidentification of children.
A review of cases from the anglophonic literature that have children as the misidentified objects, three new cases are added, and the relationship between misidentification and potential harm to these children are discussed.
A cognitive model of dangerous delusional misidentification syndromes.
A cognitive hypothesis aimed at explaining dangerousness and delusional misidentification is proposed and implications for further research are briefly outlined.
Capgras syndrome, mania and delusionally motivated assaults
In these two cases, Capgras Syndrome arising in mania was characterized by a delusion of doubles, with paranoid beliefs about the subject, altered mood, grandiosity and a manic drive, which is a particularly dangerous combination of symptoms.
Frégoli Syndrome of the Self
  • J. A. Silva, G. Leong
  • Medicine, Psychology
    Canadian journal of psychiatry. Revue canadienne de psychiatrie
  • 1993
A third subtype is reported which could be termed a Fregoli syndrome of the self, in which the affected individual harbours the delusion that others assume radically different physical appearances while their psychological make-up is unchanged.
Delusional misidentification and dangerousness: a neurobiologic hypothesis.
A hypothesis involving the psychobiological contributions to the dangerousness of delusional misidentification can be generated and may further the understanding of thedangerousness posed by psychotic individuals.
Delusional misidentification of the Capgras and intermetamorphosis types responding to clorazepate
  • A. B. Joseph
  • Psychology, Medicine
    Acta psychiatrica Scandinavica
  • 1987
It is concluded that clorazepate may be a useful treatment for some cases of chronic psychosis and psychotic misidentification.
Rapid Response to Pimozide in Treatment Resistant Delusional Disorder
This report describes two cases of delusional disorder in which a rapid response to low-dose imozide was noted and the findings are discussed in terms of imozides' unique pharmacological profile and its efficacy in syndromes with nonbizarre delusions.
The dangerousness of persons with misidentification syndromes.
The authors report on a series of 29 individuals whose delusional misidentification was associated with aggressive behaviors and important parameters which may assist in defining this sample of dangerous delusional misIdentification syndrome persons are discussed.
Observations on the epidemiology of the delusional misidentification syndromes in the Boston metropolitan area: April 1983-June 1984.
An estimate of their prevalence was found of all admissions to a locked psychiatric inpatient unit from April 1983 to June 1984, where a crude prevalence of 3.1% was found.