Schizotypal (Personality) Disorder
Criteria and text for schizotypal personality disorder can be found in the chapter “Person-
ality Disorders.” Because this disorder is considered part of the schizophrenia spectrum of
disorders, and is labeled in this section of ICD-9 and ICD-10 as schizotypal disorder, it is
listed in this chapter and discussed in detail in the DSM-5 chapter “Personality Disorders.”
Delusional Disorder
Diagnostic Criteria
297.1 (F22)
A. The presence of one (or more) delusions with a duration of 1 month or longer.
B. Criterion A for schizophrenia has never been met.
Note: Hallucinations, if present, are not prominent and are related to the delusional
theme (e.g., the sensation of being infested with insects associated with delusions of
infestation).
C. Apart from the impact of the delusion(s) or its ramifications, functioning is not markedly
impaired, and behavior is not obviously bizarre or odd.
D. If manic or major depressive episodes have occurred, these have been brief relative
to the duration of the delusional periods.
E. The disturbance is not attributable to the physiological effects of a substance or an-
other medical condition and is not better explained by another mental disorder, such
as body dysmorphic disorder or obsessive-compulsive disorder.
Specify whether:
Erotomanic type: This subtype applies when the central theme of the delusion is that
another person is in love with the individual.
Grandiose type: This subtype applies when the central theme of the delusion is the
conviction of having some great (but unrecognized) talent or insight or having made
some important discovery.
Jealous type: This subtype applies when the central theme of the individual’s delusion
is that his or her spouse or lover is unfaithful.
Persecutory type: This subtype applies when the central theme of the delusion in-
volves the individual’s belief that he or she is being conspired against, cheated, spied
on, followed, poisoned or drugged, maliciously maligned, harassed, or obstructed in
the pursuit of long-term goals.
Somatic type: This subtype applies when the central theme of the delusion involves
bodily functions or sensations.Delusional Disorder
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Mixed type: This subtype applies when no one delusional theme predominates.
Unspecified type: This subtype applies when the dominant delusional belief cannot
be clearly determined or is not described in the specific types (e.g., referential delu-
sions without a prominent persecutory or grandiose component).
Specify if:
With bizarre content: Delusions are deemed bizarre if they are clearly implausible, not
understandable, and not derived from ordinary life experiences (e.g., an individual’s be-
lief that a stranger has removed his or her internal organs and replaced them with some-
one else’s organs without leaving any wounds or scars).