Apart from schizophrenia, there are the following disorders that are part of the spectrum category of schizophrenia and other psychotic disorders: - Delusional disorder - Brief psychotic disorder - Schizophreniform disorder - Schizoaffective disorder - Substance / medication-induced psychotic disorder - Psychotic disorder due to another medical condition Catatonia - Unspecified Schizophrenia Spectrum and Other Psychotic Disorder