ABSTRACT
This chapter provides a case of a 68-year-old retired aircraft engineer who presents to his general practitioner (GP) asking for help in removing an impostor from his home. His speech is slow and repetitive and on occasions there are long pauses during which it appears he is struggling to find the appropriate word. Capgras syndrome is more properly referred to as Capgras delusion as it is a particular type of delusional disorder. Given this and the high prevalence of organic aetiology in Capgras syndrome it is important to thoroughly assess his cognitive functioning. In addition to cognitive testing using a tool such as the MMSE or Addenbrooke's Cognitive Examination (ACE) it would be appropriate to refer this man for brain imaging. Consideration may need to be given to referring him to a neuropsychologist for more detailed cognitive assessment.
