Characterized by acute onset of psychotic symptoms that emerge band reach their maximal severity within 2 weeks.
- Associated with recurrent episodes (35–45% cases)
International Classification of Diseases (ICD) classification:
|ICD-10 code||Diagnostic subcategory of ATPD (F23)||Duration, months|
|F23.0||Acute polymorphic psychotic disorder without symptoms of schizophrenia||<3|
|F23.1||Acute polymorphic psychotic disorder with symptoms of schizophrenia||<1|
|F23.2||Acute schizophrenia-like psychotic disorder||<1|
|F23.3||Other acute predominantly delusional psychotic disorders||<3|
|F23.8||Other acute and transient psychotic disorders||<3|
|F23.9||Acute and transient psychotic disorders, unspecified||<3|
Symptoms typically change rapidly, both in nature and intensity, from day to day, or even within a single day. The duration of the episode does not exceed 3 months, and most commonly lasts from a few days to 1 month.
- Delusions, hallucinations, disorganization of thought processes, perplexity or confusion, and disturbances of affect and mood.
- Catatonia-like psychomotor disturbances