From parent levels
ChapterVMental and behavioural disordersOpen
BlockF20-F29Schizophrenia, schizotypal and delusional disordersOpen
This block brings together schizophrenia, as the most important member of the group, schizotypal disorder, persistent delusional disorders, and a larger group of acute and transient psychotic disorders. Schizoaffective disorders have been retained here in spite of their controversial nature.
Schizotypal disorder
A disorder characterized by eccentric behaviour and anomalies of thinking and affect which resemble those seen in schizophrenia, though no definite and characteristic schizophrenic anomalies occur at any stage. The symptoms may include a cold or inappropriate affect; anhedonia; odd or eccentric behaviour; a tendency to social withdrawal; paranoid or bizarre ideas not amounting to true delusions; obsessive ruminations; thought disorder and perceptual disturbances; occasional transient quasi-psychotic episodes with intense illusions, auditory or other hallucinations, and delusion-like ideas, usually occurring without external provocation. There is no definite onset and evolution and course are usually those of a personality disorder.
Inclusions
- Latent schizophrenic reaction
- Schizophrenia: borderline
- Schizophrenia: latent
- Schizophrenia: prepsychotic
- Schizophrenia: prodromal
- Schizophrenia: pseudoneurotic
- Schizophrenia: pseudopsychopathic
- Schizotypal personality disorder