Folie à deux
Shared psychosis, a psychiatric syndrome / From Wikipedia, the free encyclopedia
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Folie à deux (French for "madness of two"), also known as shared psychosis[2] or shared delusional disorder (SDD), is a rare psychiatric syndrome in which symptoms of a delusional belief,[3] are "transmitted" from one individual to another.[4]
This article's tone or style may not reflect the encyclopedic tone used on Wikipedia. (July 2020) |
Induced delusional disorder | |
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Other names | Lasègue–Falret syndrome, induced delusional disorder, shared psychotic disorder |
Pronunciation |
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Specialty | Psychiatry |
The disorder, first conceptualized in 19th century French psychiatry by Charles Lasègue and Jules Falret, is also known as Lasègue–Falret syndrome.[3][5] Recent psychiatric classifications refer to the syndrome as shared psychotic disorder (DSM-4 – 297.3) and induced delusional disorder (ICD-10 – F24), although the research literature largely uses the original name. The same syndrome shared by more than two people may be called folie à trois ('three') or quatre ('four'); and further, folie en famille ('family madness') or even folie à plusieurs ('madness of several').[6]
This disorder is not in the current, fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), which considers the criteria to be insufficient or inadequate. DSM-5 does not consider Shared Psychotic Disorder (folie à deux) as a separate entity; rather, the physician should classify it as "Delusional Disorder" or in the "Other Specified Schizophrenia Spectrum and Other Psychotic Disorder" category.