There are a number of syndromes that may precede the onset of psychosis. One of these "high risk" syndromes is the Brief Intermittent Psychosis Syndrome (BIPS).
Criteria for the diagnosis of BIPS - all of the following:
(1) onset within the past 3 months
(2) psychotic features - some of the following:
(2a) unusual thought content
(2b) suspiciousness or paranoia
(2c) grandiosity
(2d) perceptual abnormalities (hallucinations, etc)
(2e) "organization of communication" (circumstantial speech that is difficult to follow but not incoherent)
(3) intermittent episodes (symptoms occur on at least one day per month for at least several minutes)
Exclusion criteria: presence of psychosis
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Specialty: Psychiatry
