The DSM-IV-TR Schizophrenia and Other Psychotic Disorders category includes disorders that have psychotic symptoms as a dominant part of their presentation (American Psychiatric Association, Diagnostic and Statistical Manual of Mental Troubles, 4th ed., rev. text, 2000). Disorders in the Schizophrenia and other psychotic disorders category include schizophrenia, schizoaffective disorder, schizophreniform disorder, delusional disorder, shared psychotic disorder, brief psychotic disorder, psychotic disorder due to a general health problem, substance-induced psychotic disorder and psychotic disorder not otherwise specified. Schizophrenia must be differentiated from mood disorders with psychotic features, because people with a mood disorder with psychotic features only express psychotic symptoms during a mood disorder; whereas people with schizophrenia exhibit psychotic features during the prodromal, active, and residual phases of their episodes (American Psychiatric Association, 2000). Schizophrenia is also differentiated from schizoaffective disorder because a person with schizophrenia experiences mood symptoms that are either brief relative to the total duration of the disturbance, occur only during the residual or promoral phases, or do not do not meet all the criteria for a mood episode. Additionally, schizophrenia is differentiated from schizophreniform because the symptoms of schizophreniform are present for one to six months; while people diagnosed with schizophrenia have had symptoms for at least six months. Additionally, brief psychotic disorder is diagnosed when symptoms have been present for one day to one month. Even though people with delusional disorder have delusions in the same way as people with schizophre...... middle of article ......the disorder category contains several diagnoses that are primarily rooted in psychosis. There are several other disorders that can resemble a psychotic disorder; therefore, diagnosticians must vigilantly go through the person's case to determine whether the psychosis is related to another disorder such as a substance-related disorder or mood disorder, or whether the primary clinical attention is due to psychotic symptoms. ReferencesAmerican Psychiatric Association (2000). Diagnostic and statistical manual of mental disorders (4th ed., rev. text). Washington, DC: American Psychiatric Association. Liu-Seifert, A., Ascher-Svanum, H., Osuntokun, O., Jen, KY, and Gomez, JC (2011). Change in productivity level in the treatment of schizophrenia with olanzapine or other antipsychotics. BioMed Central Journal of Psychiatry, 11(87), 1-10.