FUNCTIONAL psychosis is generally believed to be rare in childhood, especially in the prepubertal period, although there is insufficient evidence to exclude the fairly common occurrence of milder forms. In fact, a functional psychosis is seldom considered in childhood unless behavior shows grossly bizarre or incongruous features, when, of course, the tendency is to suspect schizophrenia.
In a series reviewed by Kasanin and Kaufman (1929) of 6,000 admissions to the Boston Psychopathic Hospital, 160 were "children," that is, persons under 16 years of age. Sixty-five of these "children" were psychotic. When their cases were studied and reclassified by the authors, although only 25 were suffering from functional psychosis, as many as 21 of these were considered to be cases of dementia praecox. Potter (1933) described a series of cases of schizophrenia in childhood. Lurie, Tietz, and Hertzman (1936), in a study of 1,000 patients at the Child Guidance Home, Cincinnati,
McHARG JF. MANIA IN CHILDHOOD: Report of a Case. AMA Arch NeurPsych. 1954;72(5):531–539. doi:https://doi.org/10.1001/archneurpsyc.1954.02330050001001
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