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Case 23 - “My Body Is Being Taken over by a Fungus!”

Delusional Disorder

Published online by Cambridge University Press:  31 October 2024

Matthew Gibfried
Affiliation:
Saint Louis University School of Medicine, Missouri
George T. Grossberg
Affiliation:
Saint Louis University School of Medicine, Missouri
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Summary

Delusional disorder is a mental illness characterized by the presence of one or more delusions for a period of at least one month. Delusional beliefs are based on the misinterpretation of external reality and are not made better with education or persuasion. The prevalence of delusional disorder in older adults is thought to be double that seen in younger adults. The occurence of delusional disorder is more common in later life when compared to other psychotic disorders such as schizophrenia. Seven subtypes of delusional disorder are recognized in the DSM-5. These include persecutory type, somatic type, jealous type, grandiose type, erotomanic type, mixed type, and unspecified type. Response to treatment of delusional disorder with antipsychotics is fair.

Type
Chapter
Information
Clinical Case Studies in Long-Term Care Psychiatry
Navigating Common Mental Health Challenges in Geriatric Care
, pp. 111 - 116
Publisher: Cambridge University Press
Print publication year: 2024

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References

References

González-Rodríguez, A., Monreal, J. A., Natividad, M., & Seeman, M. V. (2022). Seventy years of treating delusional disorder with antipsychotics: A historical perspective. Biomedicines, 10 (12).CrossRefGoogle ScholarPubMed
González-Rodríguez, A., Seeman, M. V., Izquierdo, E., Natividad, M., Guàrdia, A., Román, E., & Monreal, J. A. (2022). Delusional disorder in old age: A hypothesis-driven review of recent work focusing on epidemiology, clinical aspects, and outcomes. International Journal of Environmental Research and Public Health, 19 (13).CrossRefGoogle Scholar
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Kulkarni, K. R., Arasappa, R., Prasad, M. K., Zutshi, A., Chand, P. K., Murthy, P., & Muralidharan, K. (2017). Gender differences in persistent delusional disorder. Indian Journal of Psychological Medicine, 39 (2), 216217. doi: 10.4103/0253-7176.203123. PMID: 28515568; PMCID: PMC5385760.CrossRefGoogle ScholarPubMed
American Psychiatric Association. (2013). Diagnostic and Statistical Manual of Mental Disorders. 5th ed. https://doi.org/10.1176/appi.books.9780890425596CrossRefGoogle Scholar
Muñoz-Negro, J. E., Gómez-Sierra, F. J., Peralta, V., González-Rodríguez, A., & Cervilla, J. A. (2020). A systematic review of studies with clinician-rated scales on the pharmacological treatment of delusional disorder. International Clinical Psychopharmacology, 35, 129136.CrossRefGoogle ScholarPubMed
Kulkarni, K., Arasappa, R., Prasad, M. K., Zutshi, A., Chand, P. K., Murthy, P., Philip, M., & Muralidharan, K. (2017). Risperidone versus olanzapine in the acute treatment of persistent delusional disorder: A retrospective analysis. Psychiatry Research, 253, 270273.CrossRefGoogle ScholarPubMed

Further Reading

Tampi, R. R., Young, J., Hoq, R., Resnick, K., & Tampi, D. J. (2019). Psychotic disorders in late life: A narrative review. Therapeutic Advances in Psychopharmacology, 9.CrossRefGoogle Scholar
Trindade, P., Laginhas, C., Adão, C., Canas-Simião, H., Marques, A. R., & Caetano, R. (2022). Therapeutic challenge in delusional disorder: A case report and literature review. European Psychiatry, 65 (Suppl 1), S767. https://doi.org/10.1192/j.eurpsy.2022.1979CrossRefGoogle Scholar

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