Induced delusional disorder

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Classification according to ICD-10
F24 Induced delusional disorder
ICD-10 online (WHO version 2019)

An induced delusional disorder , also folie à deux [ fɔˈli aˈdø ] ( French: “mental disorder for two”), “common psychotic disorder” (DSM-IV 297.3), “psychotic infection” or “symbiotic delusion” is all or part Adoption of a delusional symptomatology by a close, primarily not delusional partner. After a separation, the delusion usually disappears in the previously healthy person. A social isolation is an important risk factor for the occurrence of the disorder seen.

However, more recent studies indicate that the current classification criteria may be insufficient to cover all the appearances of a slide à deux ; that the spectrum of communicable symptoms is much wider; that the “previously healthy” person is actually very much at risk of developing a psychiatric illness or already suffering from a significant disorder; and that in a large number of cases separation of partners is insufficient to remedy the disorder. While only one partner is affected in 90% of all cases, cases with three or more sick people are also known. In the case of a large number of people affected, one speaks of folie à plusieurs or folie à beaucoups ( French for “mental disorder of several people” or “mental disorder of many people”).

The “induced delusional disorder” is to be differentiated from the “conformal delusion” (delusional delusion), which denotes a joint further development of the respective delusional symptoms in two primary patients.

The DSM-5 and the draft ICD-11 no longer distinguish between primary and induced diseases.

history

The term folie à deux was coined by Ernest-Charles Lasègue and Jules Farlet . They described this phenomenon in an article jointly published in 1877 as the correlation between the "psychopathologies of related persons". There have been isolated descriptions of the phenomenon since the 17th century. In German-language literature, the terms infectious insanity and induced insanity were used for the phenomenon in the 19th century . The valid classifications DSM-IV and ICD-10 use the terms shared paranoid disorder and induced psychotic disorder , but describe the disorder largely identical.

Cultural reception

In the film Intruders by Juan Carlos Fresnadillo (2011), the clinical picture is used to resolve the story.

In the film Die Unzertrennlichen , one twin copies the disturbed behavior of the other, which is characterized by drug addiction and depression, in order to maintain a twin phantasm (what happens to one also happens to the other).

Episode 19, Season 5, of the X-Files series - The scary cases of the FBI (1998), in the English original is titled Folie à deux and is about a man who sees his boss as a monster and also convinces Fox Mulder of his vision can.

Episode 4, season 10, of the series Criminal Minds is about a man who suffers from Morgellons and convinces a woman of his madness.

In episode 3, season 1, of the series Hannibal , the term folie à deux comes up and is briefly explained.

Folie à trois (French for “mental disorder for three”) is the fifth episode of the nineteen-part mini sitcom THE SNOBS - You Can Even Without You , in which the three main characters take hallucinogenic mushrooms together and then imagine themselves in the Vietnam War .

In 2008 there was a criminal case in Great Britain in which, according to a later court finding, an induced delusional disorder was relevant to the crime (see → Ursula and Sabina Eriksson ).

A transmission of delusions is also suspected in the case of the Australian family Tromp, who for no apparent reason and hastily set out on a journey north from their farm east of Melbourne with five people on August 29, 2016 . At the time, the parents found themselves in a tense business situation, which led them to fear that someone would kill them. The paranoia spread to the two grown daughters. Only the grown son drove with us only to take care of the family, but separated from them after 800 kilometers. The two daughters also eventually separated from their parents, stole a car and reported their mother and father missing. While one of them was walking home, the older daughter was discovered by a man under the back seat of his car. She couldn't remember her name and was admitted to a clinic. The parents also eventually separated. The mother was found confused and disoriented near Canberra and was also taken to a clinic. The family man was found next to a road near the Wangaratta airport six days after the trip began .

literature

  • C. Scharfetter: General Psychopathology. Thieme, 2002.
  • Dilling et al: International Classification of Mental Disorders. ICD-10 Chapter V (F). Clinical diagnostic guidelines. Huber 2004.
  • Saß among other things: Diagnostic criteria. (DSM-IV-TR). Hogrefe Publishing House, 2003.

Web links

  • "Folie a deux hallucinatoire" - a new case of induced hallucinatory psychosis. A new entity? In: Orv Hetil. 1999, PMID 10489770 . (Hungarian)
  • Pathodynamics of symbiotic psychoses. In: Psychiatr Clin (Basel). 1977, PMID 614612 .
  • Folie à deux and dementia. In: Aust NZJ Psychiatry. 1990, PMID 2396970 .
  • Psychopathological concepts of induced insanity exemplified by folie a deux. In: Fortschr Neurol Psychiatr. 1996, PMID 8850091 .
  • Folie à deux in schizophrenia - "psychogenesis" revisited. In: Seishin Shinkeigaku Zasshi. 2004, PMID 15230353 . (Japanese)

Individual evidence

  1. ↑ Shared Psychotic Disorder ( English ) psychnet-uk.com. Retrieved May 13, 2019.
  2. ^ D. Arnone, A. Patel, GM Tan: The nosological significance of Folie à Deux: a review of the literature . In: Ann Gen Psychiatry . tape 5 , no. 11 , 2006, doi : 10.1186 / 1744-859X-5-11 , PMID 16895601 .
  3. ^ A b Horst Halthof, Matthias Bender: Induced delusional disorder . In: Garlip, Haltehof (Ed.): Rare delusional disorders . Steunkopff Verlag, 2010, ISBN 978-3-7985-1876-6 , p. 141-148 .
  4. ↑ W. Gaebel, J. Zielasek, HR Cleveland: Psychotic disorders in ICD-11. In: Asian journal of psychiatry. Volume 6, number 3, June 2013, pp. 263-265, doi : 10.1016 / j.ajp.2013.04.002 , PMID 23642991 .
  5. ↑ C. Lasègue, J. Falret: La folie à deux. In: Ann Med Psychol. 1877; 18, pp. 321-355.
  6. ↑ Michael Wirsching: Couple and family therapy . Ed .: Peter Scheib. 1st edition. Springer, Berlin 2002, ISBN 3-540-41857-1 , pp. 8 (709 p., Limited preview in Google Book search).
  7. ↑ L. Ricón: 2 psychoses and a symbiotic link. In: Acta Psiquiatr Psicol Am Lat. 1987 Sep; 33 (3), pp. 231-240. PMID 3327367 (Spanish)
  8. ↑ Intruders in the Internet Movie Database (English)
  9. ↑ a b c d e f g h i j Till Fähnders: A family odyssey : The crazy trip of the tromps. In: FAZ. September 13, 2016, accessed June 10, 2019 .
  10. ↑ a b c d e f g h Tromp family: The mystery of a tech-free road trip gone wrong. In: BBC. September 7, 2016, Retrieved June 10, 2019 (UK English).