Folie a deux in monozygotic twins with childhood trauma: A case report.

Folie a deux is a rare syndrome characterized by induction of a delusion in a susceptible person in close proximity with an individual with known delusional disorder. We report a rare case of monozygotic twins with induced delusional disorder in one of the twins. The twins had experienced childhood trauma in the form of emotional neglect and physical abuse by the father. The primary case (Twin A) was diagnosed with delusional disorder and was treated with oral antipsychotic. The secondary case (Twin B) showed resolution of symptoms after separation from twin A. The case highlights the unique presentation of induced delusional symptoms in monozygotic twins and the close association between childhood trauma and psychosis.