Diagnostic criteria for delusional disorder

Diagnostic criteria for delusional disorder

Diagnostic criteria for delusional disorder

On this page

Diagnostic Criteria - The Core Rules

Core diagnostic criteria based on DSM-5, outlining the essential features for a diagnosis of delusional disorder.

  • Delusion Presence: The patient must have one or more delusions.
  • Duration: These delusions must persist for a duration of ≥1 month.
  • Schizophrenia Exclusion: The individual has never met Criterion A for schizophrenia. Hallucinations, if present, are not prominent and are related to the delusional theme.
  • Functioning: Apart from the direct impact of the delusion(s), overall functioning is not markedly impaired, and behavior is not obviously bizarre or odd.
  • Mood Episode Exclusion: If manic or major depressive episodes have occurred, they have been brief in duration compared to the delusional periods.
  • Substance/Medical Exclusion: The disturbance is not caused by a substance, medication, or another medical condition.

⭐ Apart from the impact of the delusion(s), functioning is not markedly impaired, and behavior is not obviously bizarre or odd. This is a key feature distinguishing it from schizophrenia.

Delusion Flavors - Types & Specifiers

Delusion TypeCore BeliefClassic Example
ErotomanicSomeone is in love with the individual"A famous actor is secretly in love with me and sends me coded messages."
GrandioseInflated worth, power, or identity"I have a special relationship with the president and advise them on national security."
JealousPartner is unfaithful"I know my spouse is cheating on me, even though there's no evidence."
PersecutoryBeing conspired against or threatened"My neighbors are plotting to poison my water supply."
SomaticInvolves bodily functions or sensations"I am emitting a foul odor from my skin, despite reassurance from doctors."
  • Unspecified Type: The dominant delusional belief cannot be clearly determined.

  • Specifier: With bizarre content - Delusions are clearly implausible and not derived from ordinary life experiences (e.g., belief that an outsider has removed one's internal organs).

⭐ The persecutory type is the most common subtype of delusional disorder.

High-Yield Points - ⚡ Biggest Takeaways

  • Core feature: ≥1 delusion for ≥1 month.
  • Criterion A for schizophrenia has never been met; hallucinations, if present, are minimal and theme-related.
  • Functioning is not significantly impaired, and behavior is not overtly bizarre or odd.
  • Mood episodes, if they occur, are brief relative to the delusional period's duration.
  • The delusion is not due to a substance or another medical or neurological condition.
  • Remember to specify the delusional subtype (e.g., persecutory, jealous, grandiose).

Practice Questions: Diagnostic criteria for delusional disorder

Test your understanding with these related questions

A 29-year-old woman is brought to the physician by her father because of a change in her behavior over the past 8 months. The father says that his daughter has become increasingly withdrawn; she has not answered any phone calls or visited her family and friends. The patient says that she has to stay at home because a foreign intelligence service is monitoring her. She thinks that they are using a magnetic field to read her mind. Mental status exam shows disjointed and perseverative thinking. She is anxious and has a flat affect. Which of the following is the most likely diagnosis?

1 of 5

Flashcards: Diagnostic criteria for delusional disorder

1/7

Delusion disorder typically presents with _____ delusions

TAP TO REVEAL ANSWER

Delusion disorder typically presents with _____ delusions

non-bizarre ((bizarre or non-bizarre))

browseSpaceflip

Enjoying this lesson?

Get full access to all lessons, practice questions, and more.

Start Your Free Trial