<unk> , from the Greek roots<unk> hizein (σχίζειν, "to split") and phrēn, phren- (φρήν, φρεν-, "mind") is characterised by delusions, hallucinations, and disorganized speech and behaviour, which progressively leads to social and occupational dysfunction.  It is important to understand the difference between psychosis and<unk> .  Psychosis is a general term used to describe loss of contact with reality.  Psychosis can be observed in several conditions including severe depression, bipolar disorder, bereavement, use of illicit drugs, brain tumors and infections, strokes, etc.<unk>  is a kind of psychosis.  Typically, symptoms of<unk>  are classified as positive and negative.  Onset of symptoms typically occurs in young adulthood,  with approximately 0.4–0.6% of the population affected.  Many studies have identified progressive structural as well as functional brain changes. There is no diagnostic laboratory test for<unk>  and it continues to be clinically diagnosed by self-reported experiences and observed behavior.
Schizophrenia
Disorganized schizophrenia
Schizophreniform disorder
Schizoaffective disorder
Brief psychotic disorder
Bipolar disorder
Bipolar disorder mixed state
Delusional disorder