Meeting criteria for more than one DSM-5 personality disorder for an individual patient is:

Question

BlackTom AI · Accepted Answer

Personality disorders frequently co-occur; DSM-5 permits diagnosing more than one PD and clinical experience shows overlap is common.

Relevant knowledge points and concepts:
- DSM-5 defines personality disorders as enduring, pervasive patterns of inner experience and behavior that deviate from cultural expectations. Criteria are symptom-based and not mutually exclusive.
- The DSM clusters (A, B, C) are organizational groupings, not strict exclusionary categories.
- DSM-5 Section III dimensional model further emphasizes trait domains that cut across categorical diagnoses, explaining why symptoms of different PDs often overlap.

Step-by-step reasoning:
1. DSM-5 criteria are lists of symptoms/traits. A single patient may meet threshold criteria for more than one list because many traits (e.g., impulsivity, interpersonal instability, distrust) appear in multiple PD descriptions.
2. Empirical studies and clinical practice report high rates of comorbidity among personality disorders, especially in treatment-seeking populations, so encountering multiple PD diagnoses in one individual is routine rather than exceptional.
3. The cluster system does not prevent co-occurrence: being diagnosed with a PD in Cluster B does not rule out simultaneously meeting criteria for a Cluster C PD.
4. DSM also offers a trait-based model recognizing cross-cutting dimensions (negative affectivity, detachment, antagonism, disinhibition, psychoticism), which predicts and accommodates overlapping diagnoses.

Why the correct answer is correct:
- "Common" correctly reflects that meeting criteria for more than one PD is a frequent clinical finding owing to overlapping criteria and shared underlying traits.

Why the other options are incorrect:
- "Rare" contradicts clinical and epidemiological evidence of frequent PD comorbidity.
- "Not possible, other than for dissociative identity disorder" is false; DID is a different diagnosis and does not affect the possibility of multiple PD diagnoses.
- "Only possible if the personality disorders are in different DSM-5 clusters" is incorrect because cluster membership is organizational and does not prevent co-occurrence.

Conclusion: The correct answer is Common, which matches the provided answer.

Meeting criteria for more than one DSM-5 personality disorder for an individual patient is:单项选择题

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