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| Capgras delusion | |
|---|---|
| Name | Capgras delusion |
| Field | Psychiatry, Neurology |
| Symptoms | Belief that a familiar person has been replaced by an impostor |
| Complications | Social withdrawal, aggression, caregiver burden |
| Onset | Acute or gradual |
| Causes | Neurodegenerative disease, brain injury, psychosis |
| Risks | Schizophrenia, Alzheimer's disease, traumatic brain injury |
| Diagnosis | Clinical assessment, neuroimaging, neuropsychological testing |
| Treatment | Antipsychotics, cognitive behavioral therapy, caregiver support |
Capgras delusion is a psychiatric and neuropsychiatric syndrome in which an individual holds a fixed, false belief that a familiar person has been replaced by an impostor. It most often occurs in association with psychotic disorders, neurodegenerative diseases, and focal brain lesions, and it can produce significant distress and interpersonal disruption. Clinical management typically combines pharmacotherapy, psychosocial interventions, and support for caregivers.
Capgras delusion was first described in the early 20th century and has been reported in contexts involving schizophrenia, dementia, traumatic brain injury, and cerebrovascular events. Prominent historical and contemporary clinical reports link the syndrome to cases seen in settings associated with Sigmund Freud's era, institutions like Bethlem Royal Hospital, studies from groups at Maudsley Hospital, and case series reported by teams at Mayo Clinic, Massachusetts General Hospital, and Mount Sinai Health System. Research on the syndrome intersects findings from investigators affiliated with universities such as University of Cambridge, Harvard University, Columbia University, University College London, and Johns Hopkins University.
Patients typically present with a firm conviction that a spouse, family member, friend, or caregiver is an impostor, despite intact recognition on objective testing. Clinical descriptions in the literature reference presentations seen alongside syndromes described by Emil Kraepelin, manifestations considered by investigators linked to Eugène Bleuler, and modern case series from centers including Toronto General Hospital, Karolinska Institute, and Imperial College London. Behavioral consequences may include avoidance, confrontation, or accusations directed at individuals associated with the delusion; similar interpersonal disruptions have been described in cohorts studied at Royal Free Hospital, Bellevue Hospital, and University of California, San Francisco.
Leading models posit a disconnection between facial recognition systems and affective processing, implicating right hemisphere structures and neural networks studied in neuroanatomical work at Johns Hopkins Hospital, Stanford University, and University of Oxford. Lesion studies and neuroimaging reports have implicated regions including the right temporal lobe, right frontal lobe, and pathways studied in reports from University of Pennsylvania, Karolinska Institute, and University of Toronto. Associations with neurodegenerative disorders such as Alzheimer's disease, Lewy body dementia, and frontotemporal dementia have been documented in cohorts from Mayo Clinic, Massachusetts General Hospital, and Mount Sinai Health System. Psychopathological frameworks draw on theories advanced by investigators at Institute of Psychiatry, London, University of Cambridge, and University College London.
Diagnosis is clinical, relying on detailed history and mental state examination, often supplemented by neuropsychological assessment and structural or functional neuroimaging performed at centers such as Massachusetts General Hospital, Mayo Clinic, Karolinska Institute, and Johns Hopkins Hospital. Assessment includes evaluation for delusions described in classic psychiatric texts by figures like Kurt Schneider and comparison with case series from institutions including Bellevue Hospital, Royal London Hospital, and King's College Hospital. Diagnostic workflow typically screens for contributing neurologic disorders with input from specialists affiliated with Cleveland Clinic, Mount Sinai Health System, and University of California, Los Angeles.
Conditions to distinguish include other delusional misidentification syndromes reported in literature from Institut National de la Santé et de la Recherche Médicale, neurocognitive disorders such as Alzheimer's disease and Lewy body dementia documented at Mayo Clinic and University College London, psychotic disorders exemplified in case series from Maudsley Hospital and Bellevue Hospital, and delirium described in studies at Johns Hopkins Hospital and Massachusetts General Hospital. Neurological causes such as focal seizures, encephalitis, and right hemisphere stroke are discussed in publications from Cleveland Clinic, Stanford University, and Imperial College London.
Management strategies draw on pharmacological approaches used for psychosis and dementia in clinical practice at Massachusetts General Hospital, Mayo Clinic, and Mount Sinai Health System—including antipsychotics and cholinesterase inhibitors when indicated—combined with psychosocial interventions described by teams at University of Cambridge, University College London, and Harvard Medical School. Behavioral strategies, environmental modifications, and caregiver education are commonly implemented in memory clinics and geriatric services at UCLA Health, Toronto General Hospital, and Royal Free Hospital. Severe or dangerous behaviors may prompt inpatient care in facilities such as Bellevue Hospital or Mount Sinai Health System.
Capgras delusion is relatively uncommon but has been reported across psychiatric and neurological populations worldwide in studies from Mayo Clinic, Karolinska Institute, University College London, Massachusetts General Hospital, and Johns Hopkins Hospital. Prevalence estimates vary by setting—higher in inpatient psychiatric cohorts described at Maudsley Hospital and in dementia clinics at Mayo Clinic—and prognosis depends on etiology, with better outcomes when associated with acute, reversible causes reported by teams at Cleveland Clinic and Stanford University and poorer outcomes when linked to progressive neurodegeneration as documented by Mayo Clinic and Mount Sinai Health System.
Category:Delusional misidentification syndromes