Excerpt
The diagnosis and treatment of psychotic disorders with DSM-5 are virtually similar to approaches in years past. DSM-5 brings only modest change to our conceptualization of psychotic illness, even though the description of schizophrenia itself with respect to its psychopathology is expanded in detail. The schizophrenia spectrum concept now includes, along with schizophrenia itself, schizotypal personality disorder (also still classified under personality disorders), delusional disorder, brief psychotic disorder, schizophreniform disorder, schizoaffective disorder, and other specified (including attenuated psychosis disorder) and unspecified schizophrenia spectrum and other psychotic disorder. It is specified that the schizophrenia diagnosis must be based on at least two symptoms of psychosis. Hence, the criteria no longer allow a single delusion alone, however bizarre, to indicate schizophrenia.
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