Ganser syndrome
Template:Infobox medical condition Ganser syndrome is a rare dissociative disorder characterized by nonsensical or wrong answers to questions and other dissociative symptoms such as fugue, amnesia or conversion disorder, often with visual pseudohallucinations and a decreased state of consciousness.<ref name="Whit" /> The syndrome has also been called nonsense syndrome, balderdash syndrome, syndrome of approximate answers, hysterical pseudodementia or prison psychosis.
The term prison psychosis is sometimes used because the syndrome occurs most frequently in prison inmates, where it may be seen as an attempt to gain leniency from prison or court officials.<ref>Template:Cite journal</ref> Psychological symptoms generally resemble the patient's sense of mental illness rather than any recognized category. The syndrome may occur in persons with other mental disorders such as schizophrenia, depressive disorders, toxic states, paresis, alcohol use disorders and factitious disorders.<ref name="Kno">Knoblosh, F. (1986). Ganser Syndrome and DSM-III. American Journal of Psychiatry, 143(3), 393-393.</ref> Ganser syndrome can sometimes be diagnosed as merely malingering, but it is more often defined as a dissociative disorder.<ref name="Kno" />
The identification of Ganser syndrome is attributed to German psychiatrist Sigbert Ganser (1853–1931). In 1898, he described the disorder in prisoners awaiting trial in a penal institution in Halle, Germany. He named impaired consciousness and distorted communication, namely in the form of approximate answers (also referred to as Vorbeireden in the literature, German for "to talk past; to have a misunderstanding"), as the defining symptoms of the syndrome.<ref name="Whit">Whitlock, F.A. (1967). The Ganser Syndrome. British Journal of Psychiatry, 113(494), 19-29. {{#invoke:CS1 identifiers|main|_template=doi}}</ref> Vorbeireden involves the inability to answer questions precisely, although the content of the questions is understood.<ref name="We">Weiner, H.; Brainman, A. (1955). The Ganser Syndrome: A Review and Addition of Some Unusual Cases. American Journal of Psychiatry, 111(10), 767-773. {{#invoke:CS1 identifiers|main|_template=doi}}</ref>
Ganser syndrome is described as a dissociative disorder not otherwise specified (DDNOS) in the DSM-IV, and is not currently listed in the DSM-5. It is a rare and an often overlooked clinical phenomenon. In most cases, it is preceded by extreme stress and followed by amnesia for the period of psychosis.<ref name="We" /> In addition to approximate answers, other symptoms include a clouding of consciousness, somatic conversion disorder symptoms, confusion, stress, loss of personal identity, echolalia, and echopraxia.
Cause
To date, no definitive cause or reason of the disorder has been established.<ref name="Men">Mendis, S.; Hodgson, R.E. (2012). Ganser Syndrome: examining the aetiological debate through a systematic case report review. European Journal of Psychiatry, 26(2). {{#invoke:CS1 identifiers|main|_template=doi}}</ref> The sources that classify the syndrome as a dissociative disorder<ref name="ICD" /> or a factitious disorder conflict in their proposed aetiologies. As a result, there are differing theories as to why the syndrome develops.
Ganser syndrome was previously classified as a factitious disorder, explaining the symptoms as mimicking of what patients who do not experience psychosis believe is typical of the experience.<ref name="Ep" /> However, the DSM-IV placed the syndrome under "Dissociative Disorders Not Otherwise Specified".<ref name="APA4" /> There has been evidence of a strong correlation between approximate answers and amnesia, suggesting that these have an underlying dissociative mechanism.<ref name="Coco">Cocores, J.A.; Santa, W.G.; Patel L, MD. (1985). The Ganser Syndrome: Evidence Suggesting its Classification as a Dissociative Disorder. The International Journal of Psychiatry in Medicine, 14(1), 47-56.</ref>
Both Ganser's syndrome and the broader category of dissociative disorders have been linked to histories of hysteria, psychosis, conversion, multiple personality and possible feigning.<ref name="Coco" /> Despite this, the condition's aetiology remains under question due to associations with established psychiatric disorders, as well as organic states.
According to Stern and Whiles (1942), Ganser syndrome is a fundamentally psychotic illness.<ref name="Whit" /> As evidence, they describe the case of a woman with recurrent mania and a head injury before being submitted to treatment and the report of a man with schizophrenia who suffered from alcoholism and had recently been in prison.<ref name="Whit" />
Ganser syndrome is also sometimes referred to as "prison psychosis", emphasizing its prevalence among prisoners, generating discussion about whether the disorder only appears in this population.<ref name="Whit" /> In a study of prisoners, Estes and New concluded that escaping an intolerable situation, such as being incarcerated, prompted the syndrome's key symptoms. The study touched on the malingering controversy surrounding the syndrome, as well as the stress component that often precedes the disorder.<ref name="Bro" />
According to consultant psychiatrist F. A. Whitlock, Ganser syndrome is a hysterical disorder, on par with Ganser's description of the disorder.<ref name="Whit" /> Whitlock pointed to the number of cases in which Ganser syndrome was reported in settings of organic brain disease or functional psychosis as evidence of its hysterical foundations.<ref name="Whit" /> Kraepelin and Bumke also believed the syndrome to be of a hysterical nature.<ref name="We" /> Bumke thought the syndrome hysterical because amnesia for a traumatic emotional event tends to occur in hysteria more than in other disorders.<ref name="We" /> The giving of approximate answers is thought to be produced in hysterical personalities.<ref name="We" />
According to Mayer-Gross and Bleuler, Ganser syndrome occurs mainly in epileptic or schizophrenic patients.<ref name="We" />
Still others claim that an organic condition that could lead to the manifestation of Ganser syndrome symptoms would have to be at an advanced stage in which a diagnosis could be easily given.<ref name="Ko">Koenig, T.; Lee, H.B. (2001). A Case of Ganser Syndrome: Organic or Hysterical?. General Hospital Psychiatry, 23(4), 230-231. {{#invoke:CS1 identifiers|main|_template=doi}}</ref>
There have also been reports of trauma and stroke patients with the syndrome. A study investigating the neurological basis of Ganser syndrome described a patient with symptoms of the disorder who had a history of stroke and bifrontal infarcts.<ref name="Oy">Ouyang, D., Duggal, H. S., & Jacob, N. J. (2003). Neurobiological Basis of Ganser Syndrome. Indian Journal of Psychiatry, 45(4), 255–256.</ref> They discovered that hyperglutamatergic states, which are caused by both strokes and stress, share a relationship with dissociative symptoms, suggesting a possible organic pathology that can predispose individuals to the syndrome.<ref name="Oy" /> Wirtz and colleagues (2008) described a patient with Ganser syndrome after a left-hemispheric middle cerebral artery infarct.<ref name="Oy" /> A neuropsychological examination revealed atypical lateralisation of cognitive functions, leading to the conclusion that the giving of approximate answers might be related to frontal-executive cerebral dysfunction.<ref name="Oy" />
Diagnosis
Ganser syndrome was listed under Factitious Disorder with Psychological Symptoms in the DSM-III.<ref name="APA3">American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. 3rd ed. Washington, DC. American Psychiatric Association, 1952.</ref> The criteria of this category emphasized symptoms that cannot be explained by other mental disorders, psychological symptoms under the control of the individual, and the goal of assuming a patient role, not otherwise understandable given their circumstances.<ref name="APA3" />
The DSM-IV-TR classified Ganser syndrome as a dissociative disorder defined by the giving of approximate answers to questions (e.g. '2 plus 2 equals 5' when not associated with dissociative amnesia or dissociative fugue).<ref name="APA4">American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. 4th ed. Text rev. Washington, DC. American Psychiatric Association, 2000.</ref> The ICD-10<ref name="ICD">World Health Organization. (1992). The ICD-10 classification of mental and behavioural disorders: Clinical descriptions and diagnostic guidelines. Geneva: World Health Organization.</ref> and DSM-IV do not specify any diagnostic criteria—apart from approximate answers—as a requirement for a Ganser syndrome diagnosis.<ref name="APA4" /> Most case studies of the syndrome also depend on the presence of approximate answers and at least one of the other symptoms described by Ganser in his original paper.<ref name="We" /> Usually when giving wrong answers, individuals are only slightly off, showing that the individual understood the question<ref name="Bro">Bromberg, W. (1986). The neglect of Ganser Syndrome. The American Journal of Psychiatry, 143(7), 937-938.</ref> For instance, when asked how many legs a horse has, they might say, "five". Although subjects appear confused in their answers, in other respects they appear to understand their surroundings.<ref name="Bro" /> Amnesia, loss of personal identity, and clouding of consciousness were among the most common symptoms apart from approximate answers.<ref name="We" />
Although there is currently no uniform way to diagnose the syndrome, a full neurological and mental state examination is recommended to determine its presence as well as tests that assess malingering.<ref name="Ep">Epstein, R.S. (1991). Ganser Syndrome, Trance Logic, and the Question of Malingering. Psychiatric Annals, 21(4), 238-244. {{#invoke:CS1 identifiers|main|_template=doi}}</ref> In addition to mental examination, other investigations should be done to exclude other underlying causes. These include computer tomography scans (CT) or magnetic resonance imaging (MRI) scans to exclude structural pathology, lumbar puncture to exclude meningitis or encephalitis, and electroencephalography (EEG), to exclude delirium or seizure disorder.<ref name="Dw">Dwyer, J.; Reid, S. (2004). Ganser's Syndrome. The Lancet, 364(9432), 471-473. {{#invoke:CS1 identifiers|main|_template=doi}}</ref>
Diagnosing Ganser syndrome is challenging because of its rarity and symptom variability. The manifested symptoms may be dependent on the individual's conception of what mental illness entails, creating the possibility of a wide range of combinations of symptoms present in an individual with Ganser syndrome.<ref name="Ep" />
Treatment
In many cases, the symptoms seem to dwindle after a few days, and patients are often left with amnesia for the period of psychosis.<ref name="We" /> Hospitalization may be necessary during the acute phase of symptoms, and psychiatric care if the patient is a danger to self or others.<ref name="Car">Carney, M.W.P.; Chary, T.N.K.; Robotis, P.; Childs, A. (1987). Ganser Syndrome and its Management. British Journal of Psychiatry, 151, 697-700. {{#invoke:CS1 identifiers|main|_template=doi}}</ref> A neurological consult is advised to rule out any organic cause. Psychotherapy may also recommended for ensuring and maintaining safety.
Ganser patients typically recover quickly and completely.<ref name="En">Enoch, M. D., & Irving, G. (1962). The Ganser syndrome. Acta Psychiatrica Scandinavica, 38(3), 213-222.</ref> Since Ganser syndrome can be a response to psychic deterioration, its resolution may be followed by other psychiatric symptoms, such as schizophrenia<ref name="lib">Lieberman, A.A. (1954). The Ganser Syndrome in Psychoses. Journal of Nervous and Mental Disease, 120(1-2), 10-16. {{#invoke:CS1 identifiers|main|_template=doi}}</ref> and depression,<ref name="Ha">Haddah, P.M. (1993). Ganser Syndrome Followed by Major Depressive Episode. British Journal of Psychiatry, 161, 251-253. {{#invoke:CS1 identifiers|main|_template=doi}}</ref> hence the rationale behind the recommendation of psychotherapy. Medication is usually not required.<ref name="Car" />
Epidemiology
Reviewing multiple collections of case studies, the incidence of the disorder is not precisely known.<ref name="Dw" /><ref>Template:Cite journal</ref><ref name=":0">Template:Cite journal</ref><ref>Agarwal, S., Dhami, A., Dahuja, M., & Choudhary, S. (2018). Ganser syndrome in adolescent male: A rare case report. Journal of Indian Association for Child & Adolescent Mental Health, 14(1).</ref> Individuals of multiple backgrounds have been reported as having the disorder. The syndrome was historically thought to be more common in men. However, Whitlock<ref name="Whit" /> speculates that the higher reported rate of Ganser in men might be due to the greater proportion of men who are incarcerated.<ref name=":0" /><ref>Template:Cite journal</ref> It has been most frequently seen in individuals ages 15 to 40 and has also been observed in children.<ref name="Mill">Miller, P.; Bramble, D.; Buxton, N. (1997). Case Study: Ganser Syndrome in Children and Adolescents. Journal of the American Academy of Child and Adolescent Psychiatry, 36(1), 112-115. {{#invoke:CS1 identifiers|main|_template=doi}}</ref> This wide age range is derived from case studies, and therefore may not be an accurate estimate. Ganser syndrome has also been observed in groups other than prison populations.<ref name="Whit" />
Controversy
There is controversy regarding whether Ganser syndrome is a valid clinical entity.<ref name="Ep" /> For example, Bromberg (1986) has argued that the syndrome is not due to or related to mental illness, but rather a sort of defense against legal punishment.<ref name="Bro" /> Some see it as conscious lying, denial and repression, presenting Ganser syndrome symptoms as malingering instead of a dissociative or factitious disorder.<ref name="Bro" />
One case study of Ganser syndrome presented a middle-aged man who had been in a car crash and wanted disability insurance benefits.<ref name="Mer">Merckelbach, H.; Peters, M.; Jelicic, M.; Brands, I. and Smeets, T. (2006). Detecting malingering of Ganser‐like symptoms with tests: A case study. Psychiatry and Clinical Neurosciences, 60: 636-638. {{#invoke:CS1 identifiers|main|_template=doi}}</ref> Since he had a big incentive, psychologists took careful measures and implemented testing with malingering instruments, which showed that the man performed below chance on simple memory tests and claimed to experience non-existent symptoms.<ref name="Mer" /> Upon further inspection of the collateral information, they found that the patient took part in high-level sports and other activities that were inconsistent with the cognitive dysfunctions he reported, and they determined it to be a case of malingering.<ref name="Mer" />
Estes and New (1948) concluded that the motivation for the symptoms of the syndrome was escaping an "intolerable situation".<ref name="Bro" /> Stern and Whiles proposed an alternative explanation, citing Ganser syndrome presented itself in individuals who, although not psychologically well, do not realize it, and want to appear so.<ref name="Bro" /> Still others attribute the syndrome to inattention, purposeful evasion, suppression, alcoholic excess, head injury, and to unconscious attempts to deceive others as a means to free themselves from responsibility for their actions.<ref name="Bro" /> This denial of behaviour can be seen as a way to overcome anxiety and helplessness brought on by the stressful event that often precedes the syndrome.<ref name="Bro" />
These aetiological debates focus on the main symptom of Ganser syndrome and its importance in its diagnosis. Approximate answers are prominent in the Ganser syndrome literature, causing concern in those who believe that this is a relatively simple symptom to feign.<ref name="Ep" />
Ganser syndrome was regarded as an Adjustment Reaction of Adult Life in the DSM-II and later was moved under the category of Factitious Disorder with Psychological Symptoms in the DSM-III.<ref name="APA3" /> Ganser syndrome can also be found under the Dissociative Disorder Not Otherwise Specified (DDNOS) section of the DSM-IV-TR,<ref name="APA4" /> however it is not listed in the DSM-5, which got rid of the DDNOS section and replaced it with Other Specified Dissociative Disorder (OSDD) and Unspecified Dissociative Disorder (USDD).<ref>American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). Arlington, VA: American Psychiatric Publishing</ref> Despite this, the International Classification of Diseases has Ganser syndrome listed under dissociative disorders.<ref name="ICD" />
See also
References
Further reading
External links
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