Search strategies-Characteristics, treatment, and outcomes of Folie a Deux. A systematic review of case report and case series

Folie a deux is a rare psychotic disorder in which two people share the same delusional beliefs. It is also known as "shared psychosis" or "induced psychosis." One person, the "primary case," experiences delusions or hallucinations, and the other person, the "secondary case," comes to adopt the same delusions or hallucinations as a result of their close relationship with the primary case