Delusional disorder is characterized by the presence of delusions categorized as bizarre or non-bizarre without any occurring symptoms of schizophrenia or any other psychological disorders. Bizarre delusions are the beliefs that an affected individual believes regardless of how inconceivable they are. For example: a person believing that their parents have been replaced by aliens with doppelgängers. Non-bizarre delusions are beliefs that have some validity, however are impossible due to the certain circumstances of the individual. An example of this would be a person believing that their neighbor is responsible for their missing dog so they could receive the reward offered for the dog's return.
Case Example
A notable case of