Relationship between Cycloid Psychosis and Typical Affective Psychosis

Cutting, John

doi:10.1159/000284663

Cited by 23 publications

(15 citation statements)

References 12 publications

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“…A comparable overlap with mood disorders was reported in a reanalysis of the original Perris patient population [30]. During the acute phase of CP, an overlap of 20–25% with schizophrenia was demonstrated [5, 6]. The latter may be explained by the absence of a criterion of the duration for CP.…”

Section: Discussionsupporting

confidence: 57%

“…The nosological separation from other endogenous psychoses and its prognostic validity were stressed [3]. These observations were confirmed in subsequent studies, although an overlap with affective disorders was found [4, 5, 6]. …”

Section: Introductionmentioning

confidence: 76%

“…Of further importance may be the association between CP and personality disorders reported in the literature [6, 39]. In addition, a ‘vulnerable personality structure’ was proposed in patients with reactive and psychogenic psychoses [40, 41]and in those with ‘bouffées délirantes’ and CP [42, 43, 44].…”

Section: Discussionmentioning

confidence: 99%

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Nonschizophrenic Psychotic Disorders: The Case of Cycloid Psychoses

et al. 2004

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Background: Cycloid psychosis is a psychiatric disorder known for about 100 years. This disorder is at present partly and simplified represented in the ICD-10. Sampling and Methods: Over a period of 15 months, 139 consecutively acutely admitted psychotic patients were assessed, by means of different diagnostic instruments, in order to investigate the prevalence and the symptom profile of cycloid psychoses. In addition, the concordance between the diagnoses cycloid psychosis, brief psychotic disorder, and acute polymorphic psychotic disorder with or without symptoms of schizophrenia was calculated. Results: Cycloid psychoses were present in 13% of the patients. There was a significant but small overlap with the DSM brief psychotic disorder and the ICD acute polymorphic psychotic disorder. Conclusions: This study demonstrates that cycloid psychoses can be identified with the proper diagnostic instruments in a proportion that is also found in other studies. Since this type of psychosis entails a distinct prognosis and may require a specific treatment, its identification is of clinical importance. Limitations are the nature of the psychiatric facility with an inherent bias in the selection of patients and the lack of a long-term evaluation.

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Section: Discussionsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 76%

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Nonschizophrenic Psychotic Disorders: The Case of Cycloid Psychoses

et al. 2004

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“…More specifically, its nosological status within the broad field of psychotic disorders, and particularly in relation to mood disorders and schizophrenia, continues to be a matter of debate. Studies addressing this question have supported the view of cycloid psychosis as an independent nosological entity [1,3,20,31], as an atypical variant of affective psychosis [32], as an atypical form of schizophrenia [33], and as a heterogeneous condition [14,16,17]. Finally, other studies have yielded inconclusive results [34,35].…”

Section: The Nosological Status Of Cycloid Psychosismentioning

confidence: 99%

Cycloid psychosis: An examination of the validity of the concept

Peralta

Cuesta²,

Zandio³

2007

Curr Psychiatry Rep

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The diagnosis of cycloid psychosis has a long tradition in European psychiatry. However, it has been poorly assimilated within the DSM IV and ICD-10 diagnostic systems. Leonhard set the basis for the current conceptualization of the disorder, and Perris and Brockington developed the first operational diagnostic criteria. However, the two conceptualizations of the disorder are not the same and differ across a number of meaningful variables. Cycloid psychosis is a useful concept in that it possesses both clinical and predictive validity. Despite the high prevalence of mood symptoms and syndromes, cycloid psychosis does not equal schizoaffective disorder. Although a substantial body of evidence suggests that cycloid psychosis differs meaningfully from typical schizophrenia, it is less clear whether it differs from major mood disorders or represents an independent nosological entity. The existence of putative subtypes is also likely, and the differentiation between affective and nonaffective subtypes has received some support.

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“…Da ihre Abgrenzbarkeit gegenüber schizophrenen Erkrankungen inzwischen durch eine Reihe von Befunden gut bestätigt werden konnte [2,9,10,31,32], rückt nun ihre Unterscheidbarkeit gegenüber bipolaren affektiven Psychosen in den Blickpunkt des Interesses, zumal zykloide Psychosen von verschiedenen Autoren als atypische Varianten bipolarer affektiver Erkrankungen angesehen werden [6,7,15,16,25].…”

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