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Shared Delusional Disorder Reviewed 5/2014

Irene C. Coletsos, MD, Harold J. Bursztajn, MD
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  • Description
  • Epidemiology
  • Etiology and Pathophysiology
  • Risk Factors
  • General Prevention
  • Associated Conditions


  • History
  • Physical Exam
  • Differential Diagnosis
  • Tests


  • Medication (Drugs)
  • Issues for Referral
  • Additional Therapies
  • Complementary and Alternative Medicine
  • In-patient Considerations


  • Follow-Up Recommendations
  • Patient Education
  • Prognosis
  • Complications
The following is an excerpt....
  • Shared delusional disorder occurs when a delusional belief held by 1 person (the “primary”) becomes shared by 1 other (the “secondary”) or several other people associated with that person. In most cases, a 2nd person is dependent on, or has a passive relationship with, the primarily affected person. It is sometimes difficult to determine who is the primary and who is the secondary. The individuals involved are usually close and may be isolated from others.
  • By definition, the shared belief, in order to be considered delusional, is one that is not generally accepted within the person's culture. As a result, this illness exists along a spectrum: The least severe form being a shared “overvalued idea” (those holding ...

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