Capgras syndrome is a rare disorder in which a person holds the delusional belief that an identical-looking imposter has replaced someone significant in their life. They believe the doppelganger looks ...

Marty Berman’s case probably developed because of his Lewy body dementia, says Carol, the same illness that had killed his father. This condition is the most common type of dementia after Alzheimer’s ...

Imagine waking up and believing your spouse is no longer real. That’s the terrifying reality for those with Capgras Syndrome, a rare delusional disorder identified in the early 20th century. We ...