Historical and conceptual features of acute polymorphic psychosis: a myth of European psychiatry from bouffée délirante to ICD-11 acute and transient psychotic disorder.

This paper deals with the history and epistemology of acute polymorphic psychosis. We undertook a comparative study of short-lived psychotic disorders used in different European countries since the late nineteenth century. The theory of degeneration offered a speculative basis to conceptualization of conditions such as bouffée délirante, cycloid psychosis and reactive psychosis, but it seems likely that different factors contributed to the profusion of clinical concepts with adverse effects on both nomenclature and classification. The resulting picture suggests that earlier nosological concepts tend to converge on common descriptive features and challenge the diagnostic categories for short-lived psychotic disorders listed in modern symptom-based psychiatric classifications.

Reactive Psychosis: Discrepancy Between Nosological Concepts and Descriptive Categories.

ABSTRACT: Reactive psychosis (RP) is a trauma-induced category whose meaning has varied in relation to the role attributed to lived experiences or vulnerable personality. It has long been described in different countries, but seldom investigated under the influence of symptom-based psychiatric classifications. This article aims to examine the development of RP since the early 20th century, outline how it has been incorporated in modern diagnostic classifications, and set out empirical findings. It is likely that variations in terminology and diagnostic practice have affected estimates of the frequency and hampered the validity of RP in earlier studies. To enhance reliability, RP underwent several changes in successive Diagnostic and Statistical Manual of Mental Disorders and ICD versions and was eventually replaced with descriptive categories for short-lived psychotic disorders. Clinical observations during the COVID-19 pandemic attest the durability of RP, but the current categories prove unhelpful in identifying it and have failed to encourage research.

Conceptual Issues in Acute and Transient Psychotic Disorders.

Short-lived psychotic disorders as currently listed under "acute and transient psychotic disorder," ICD-11 Classification of Mental, Behavioural, and Neurodevelopmental Disorders, and "brief psychotic disorder," Diagnostic and Statistical Manual of Mental Disorders (DSM-5), constitute a point of divergence in the classification of psychotic disorders between the 2 diagnostic systems, which reveals the lack of knowledge about these conditions. Whether this is due to conceptual shortcomings inherent to the categories themselves and which spill over onto research or reflects a mismatch between the diagnostic criteria used and research techniques needs clarification. This study aimed to examine conceptual issues involved in the development of the above categories and shows that little continuity exists between earlier nosological concepts such as bouffée délirante, cycloid psychosis, and reactive psychosis and modern descriptive categories used to classify short-lived psychotic disorders. It seems likely that shortcomings in terms of symptom completeness, specificity, and heterogeneity, in addition to changes in definition and diagnostic criteria in successive DSM and ICD versions, have hampered empirical research, making it difficult to enhance the understanding of these conditions and achieve a closer concordance between the 2 classificatory systems.

Short-term course and outcome of acute and transient psychotic disorders: Differences from other types of psychosis with acute onset.

BACKGROUND: The category of 'acute and transient psychotic disorders' (ATPDs) appeared in the ICD-10 Classification of Mental and Behavioural Disorders (ICD-10), but its distinctive features remain uncertain. AIM: To examine the course and outcome of ATPDs, pointing out differences from other types of psychosis. METHODS: A one-year follow-up investigation of patients enrolled at the former World Health Organization (WHO) Centre for Research and Training in Mental Health in Aarhus (Denmark) for the WHO collaborative study on acute psychoses. RESULTS: Of 91 patients aged 15-60 years presenting with acute psychosis, 47 (51.6%) were diagnosed with ATPD, and it occurred more commonly in females; yet, the other acute psychoses featured mainly mood disorders and affected equally both genders. After 1 year, the ATPD diagnosis did not change in 28 cases (59.6%); the remaining developed either affective psychoses (27.7%), or schizophrenia and schizoaffective disorder (12.8%). Nearly, all patients with unchanged diagnosis of ATPD enjoyed full recovery, while those with other types of acute psychosis had significantly higher rates of recurrence or incomplete remission. Duration of illness within 4 weeks and stressful events in the 3 months before symptom onset predicted 1-year favourable clinical outcome for acute psychoses. CONCLUSION: Although ATPDs fared better over the short-term than other acute psychoses, their diagnostic stability is relatively low.

Continuity of care from child and adolescent to adult mental health services: evidence from a regional survey in Northern Italy.

To examine clinical and demographic factors associated with continuity of care from child-adolescent (CAMHS) to adult mental health services (AMHS), we undertook a record-linkage study to the Adult Mental Health Information System including all those 16 years old and over who were listed between 2010 and 2013 in the Child and Adolescent Neuropsychiatry Information System in Emilia-Romagna, an Italian region of nearly 4.5 million residents. From a cohort of 8239 adolescents attending CAMHS (population at risk about 144,000), 821 (19.4 %) moved to AMHS, excluding cases with specific developmental disorders, whose conditions were not managed by adult psychiatrists, and those with mental retardation who attended usually social services. Young people referred for treatment to AMHS were more likely to receive a discharge diagnosis of schizophrenia and related disorders (Odds Ratio [OR] 3.92; 95 % confidence interval [CI] 2.17-7.08), personality disorders (OR 2.69; 95 % CI 1.89-3.83), and pervasive developmental disorders (OR 2.13; 95 % CI 1.51-2.99). Further factors predicting transfer to AMHS were not living with parents, inpatient psychiatric admission, and being on medication in the previous 24 months. These findings suggest that a relatively small number of adolescents moved to AMHS and are likely to reflect the configuration of local mental health services and alternative care available, mainly for those with less-severe mental disorders.

Mortality and causes of death of acute and transient psychotic disorders.

BACKGROUND: Little is known about mortality associated with acute transient psychoses. This paper examines mortality and causes of death of ICD-10 F23 'Acute and transient psychotic disorders' (ATPD). METHOD: Data from all subjects aged over 15 years who were enrolled in 1996 in the Danish psychiatric register with a first-admission diagnosis of ATPD were linked to the national register of causes of death. The standardized mortality ratio (SMR) for overall mortality and specific categories were calculated. RESULTS: Over the period 1996-2001, 87 (17.3%) of 503 patients with ATPD had died, accounting for a mortality rate of 35.3 per 1,000 person/years. The SMR for all causes (2.9), natural causes (2.5), and unnatural causes (9.2) were significantly increased. Suicide had the greatest SMR (30.9). CONCLUSIONS: These findings argue for excess mortality of ATPD particularly from suicide.

Wimmer's concept of psychogenic psychosis revisited.

In the early twentieth century the Danish psychiatrist August Wimmer (1872-1937) developed the concept of psychogenic psychosis (PP) as a category of mental disorders separate from schizophrenia and manic depression. It subsumed a variety of clinical conditions with affective, confusional and paranoid features typically triggered by a psychical trauma.Wimmer's work has established itself as one of the classic texts in Scandinavian psychiatry but, for linguistic reasons, long remained almost unknown in other European countries.Translated into English in 2003, it is now available for historical and psychopathological analyses. This paper describes the original meaning of PP and sets it in context, then discusses the implications arising from the usage of the diagnostic categories introduced to replace PP in modern international classifications.