DSM-5-TR · personality · differential diagnosis

Could I have a personality disorder?

A personality disorder is not simply a personality trait. In DSM-5-TR, it is an enduring, inflexible and pervasive pattern of thinking, feeling or behaving that causes significant distress or impairment.

DSM-5-TR describes 10 specific personality disorders, traditionally organised into Clusters A, B and C. The clusters are useful for presentation, but they do not replace individual clinical assessment.

General DSM-5-TR requirements

When does a personality pattern become a disorder?

Diagnosis requires an enduring pattern that deviates markedly from cultural expectations in at least two domains: cognition, affectivity, interpersonal functioning or impulse control.

1

Pervasive

The pattern appears across many personal and social situations rather than in one isolated context.

2

Inflexible and stable

It is long-standing and can be traced back at least to adolescence or early adulthood.

3

Clinically significant

It causes significant distress or impairment in social, occupational or other important areas.

4

Differential diagnosis

The pattern is not better explained by another mental disorder, a substance/medication effect or a medical condition.

Under age 18: a personality disorder may be diagnosed when the pattern has been present for at least one year and is not simply a developmental stage. Exception: antisocial personality disorder is not diagnosed before age 18.
A

Cluster A

Mistrust, detachment or eccentricity

B

Cluster B

Dramatic, emotional or erratic patterns

An important clarification

Ten specific disorders — not eleven

DSM-5-TR’s main categorical system contains ten specific personality disorders. Personality change due to another medical condition is a separate diagnosis related to the physiological effects of a medical condition; it is not an eleventh specific personality disorder.

Assessment

How is a personality disorder diagnosed?

A checklist or a few matching traits are not enough. Diagnosis requires clinical interviewing, review of the person’s long-term pattern and its impact across settings, and differential diagnosis. Personality questionnaires and tests can support the assessment.

Do several profiles seem to fit?

That is common: some traits overlap across personality disorders and can also occur in other conditions. The purpose of assessment is precisely to avoid starting from a predetermined answer.