Folie à deux (transtorno delirante induzido)

Folie a deux, or induced delusional disorder, is a rare syndrome characterized by transfer of delusions from a primary subject to one or more secondary subjects. Though a diagnosis considered rare and even so forgotten in current psychiatric treated our article describes a case of folie a deux between mother (primary delusional subject) and daughter (previously healthy and secondary psychotic subject) had therapeutic success and evolution very favorable. Although our case had favorable development, there are reports in the literature tragic outcomes as infanticide. In addition, our article draws attention to some important aspects. First, folie a deux frames can occur in many situations and not only in feedlots, unlike the current classification systems tend to do. Also, they are not as rare as it is supposed. Finally, clinicians should be alert to possible psychiatric problems not recognized in the individual considered secondary.