delusional disorder
in DSM–IV–TR, any one of a group of psychotic disorders with the essential feature of one or more nonbizarre delusions that persist for at least 1 month but are not due to schizophrenia. The delusions are nonbizarre in that they feature situations that could conceivably occur in real life (e.g., being followed, poisoned, infected, deceived by one’s government). Diagnosis also requires that the effects of substances (e.g., cocaine) or a medical condition be ruled out as causes of the delusions. Seven types of delusional disorder are specified, according to the theme of the delusion: erotomanic, grandiose, jealous, persecutory, somatic, mixed, and unspecified. Criteria changes for delusional disorder in DSM–5 include the following: The delusions may be either nonbizarre or bizarre (i.e., implausible), and their potential presence as a result of an ingested substance, a medical condition, or another mental disorder sometimes
associated with firmly held delusional beliefs (e.g., obsessive-compulsive disorder, body dysmorphic disorder) must be ruled out. Formerly called paranoid disorder.