Schizophrenia + similar

Question 1

Differential diagnosis for psychosis

Answer 1

Schizophrenia
Schizoaffective disorder
Psychotic disorder due to underlying medical condition ie delirium
Substance induced/ substance withdrawal
 psychotic disorder
Major depressive disorder
Post-traumatic stress disorder

Question 2

What is the difference between brief psychotic disorder, delusional disorder, schizophreniform disorder and schizophrenia?

Answer 2

Brief psychotic disorder: hallucinations/delusions which last at least one day but less than one month

Delusional disorder: delusions present for more than one month and has never met criteria for schizophrenia

Schizophreniform disorder:delusions and hallucinations and disorganised speech for greater than one month but less than 6

Schizophrenia: delusions/hallucinations/disorganised speech for greater than 6 months

Question 3

Schizoaffective disorder define

Answer 3

Schizophrenia including a mood episode (either manic or depressive) concurrently