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Delusional Disorder

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Updated November 21, 2007

Definition:
Delusional disorder is a condition where a person has a fixed, firm belief about imaginary but not impossible situations, but has no other symptoms of a psychotic or mood disorder. It has several subtypes. In delusional disorder, delusions may include:
  • believing one is being followed or watched
  • believing a spouse is unfaithful when this is not the case
  • believing one has an unusual illness such as plague or scurvy
  • believing one has a special relationship with a celebrity
Some celebrity stalkers may fall into the last category.

A person with delusional disorder may seem completely normal except for holding to a single delusion.

Pronunciation: de-LOOZH-un-ul

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