Q: 84 years old male recovering from pneumonia in ICU consistently complains of imposters in the room while family members are there. What's the diagnosis?
Answer: Capgras syndrome
Paranoid delusions are common in patients with baseline dementia or Alzheimer's disease (AD). Common paranoid delusions include intruders in the house, stolen personal objects, spouse's unfaithfulness, or Capgras syndrome.
Capgras syndrome, named after the French psychiatrist, is the belief that impostors have replaced family members.
#psychiatry
References:
1. Shah K, Jain SB, Wadhwa R. Capgras Syndrome. [Updated 2022 Jun 4]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK570557/
2. Barrelle A, Luauté JP. Capgras Syndrome and Other Delusional Misidentification Syndromes. Front Neurol Neurosci. 2018;42:35-43. doi: 10.1159/000475680. Epub 2017 Nov 17. PMID: 29151089.
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