Folie simultanée in monozygotic twins.

OBJECTIVE

To present a case report of folie simultanée in monozygotic twins. The literature describing folie à deux in twins is also reviewed and the common clinical findings are presented.

METHOD

Case presentation and review of the literature.

RESULTS

Clinical observations of monozygotic twins with folie simultanée suggest that the delusions tend to progress over time with each twin reinforcing the delusion in the second.

CONCLUSIONS

The concept of a delusion resonating between individuals may account for the rapid progression and escalation of these delusions.