Case ReportsA Case of Capgras Syndrome With Frontotemporal DementiaMetin, Baris MD, PhD*; Arikan, Mehmet K. MD, PhD*,†; Kalem, Sukriye A. PhD‡; Tarhan, Nevzat MD*Author Information *Department of Psychology, Uskudar University, Istanbul, Turkey †Kemal Arikan Psychiatry Clinic, Istanbul, Turkey ‡Department of Neurology, School of Medicine, Istanbul University, Istanbul, Turkey The authors declare no conflicts of interest. Correspondence: Mehmet K. Arikan, MD, PhD, Halaskargazi Cad. No: 103/4B, Osmanbey, Istanbul, Turkey 34371 (email: [email protected]). Cognitive and Behavioral Neurology: June 2019 - Volume 32 - Issue 2 - p 134-138 doi: 10.1097/WNN.0000000000000191 Buy Metrics Abstract Capgras syndrome (CS), also called imposter syndrome, is a rare psychiatric condition that is characterized by the delusion that a family relative or close friend has been replaced by an identical imposter. Here, we describe a 69-year-old man with CS who presented to the Kemal Arikan Psychiatry Clinic with an ongoing belief that his wife had been replaced by an identical imposter. MRI showed selective anterior left temporal lobe atrophy. Quantitative EEG showed bilateral frontal and temporal slowing. Neuropsychological profiling identified a broad range of deficits in the areas of naming, executive function, and long-term memory. On the basis of these findings, we diagnosed frontotemporal dementia. This case demonstrates that CS can clinically accompany frontotemporal dementia. Copyright © 2019 Wolters Kluwer Health, Inc. All rights reserved.