Borderline Personality Disorder and Antisocial Personality Disorder are easy to mix up on the boards. Here's a side-by-side comparison — presentation, workup, imaging, and first-line treatment — drawn from our full outlines.
Borderline Personality Disorder vs Antisocial Personality Disorder at a glance
Borderline Personality Disorder: Pervasive instability of relationships, self-image, affect, and marked impulsivity beginning in early adulthood.
Antisocial Personality Disorder: Pervasive disregard for and violation of the rights of others since age 15, with conduct disorder before age 15.
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Question 1PsychiatryMedium
A 28-year-old woman with borderline personality disorder presents after a low-lethality overdose of diphenhydramine taken impulsively after a fight with her boyfriend. She is medically stable. She denies ongoing suicidal ideation. She has had multiple similar episodes. Which of the following is the most appropriate psychiatric management?
Borderline personality disorder (BPD) with recurrent parasuicidal behavior — DBT (Dialectical Behavior Therapy) is the evidence-based treatment of choice for BPD.
DBT specifically reduces self-harm behaviors, hospitalizations, and suicidal ideation in BPD.
DBT achieves this through skills training: mindfulness, distress tolerance, emotional regulation, and interpersonal effectiveness.
Why the others are wrong
Lithium for mood stabilization — Lithium may help specific symptoms (mood lability, impulsivity) but is an adjunct, not primary treatment for BPD.
Selective serotonin reuptake inhibitor (SSRI) monotherapy — Selective serotonin reuptake inhibitors (SSRIs) may help specific symptoms (mood lability, impulsivity) but are adjuncts, not primary treatment for BPD; pharmacotherapy alone is insufficient.
Brief supportive psychotherapy — Supportive therapy offers containment but lacks the structured skills modules (mindfulness, distress tolerance, emotion regulation) that give DBT its demonstrated reduction in recurrent self-harm in BPD.
Question 2PsychiatryMedium
A 24-year-old man is brought to a court-ordered psychiatric evaluation after his third arrest for assault and theft. Since his late teens he has been repeatedly fired for unreliability, has conned several acquaintances out of money, and expresses no remorse for hurting others. Collateral records confirm a pervasive pattern of disregard for the rights of others. The clinician is assessing his developmental history to gauge the likelihood of antisocial personality disorder. Which of the following is the strongest risk factor for this condition?
AComorbid childhood ADHD with aggression
BFamily history of substance use disorder
CLower childhood socioeconomic status
DConduct disorder onset before age 15
Reveal answer & full explanation
Correct answer: D — Conduct disorder onset before age 15
AComorbid childhood ADHD with aggression
BFamily history of substance use disorder
CLower childhood socioeconomic status
DConduct disorder onset before age 15✓
Why Conduct disorder onset before age 15 is correct
DSM-5-TR makes documented conduct disorder with onset before age 15 a required diagnostic criterion (Criterion C) for antisocial personality disorder; without evidence of pre-15 antisocial behavior, the diagnosis cannot be made.
Because it is necessary for the diagnosis, it is by definition the single strongest and most predictive risk factor, with the adult antisocial pattern conceptualized as the developmental continuation of childhood conduct disorder.
Why the others are wrong
Comorbid childhood ADHD with aggression raises risk, particularly when it co-occurs with conduct disorder, but it is a contributory rather than required factor and is far less predictive on its own.
Lower childhood socioeconomic status is a recognized environmental risk factor through community violence exposure and instability, but it is a weak, nonspecific contributor that is neither necessary nor sufficient.
Family history of substance use disorder reflects heritable and environmental loading and modestly raises risk, but it does not approach the predictive weight of an established childhood conduct disorder.
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Pervasive instability of relationships, self-image, affect, and marked impulsivity beginning in early adulthood.
Pervasive disregard for and violation of the rights of others since age 15, with conduct disorder before age 15.
Classic presentation
>=5 of 9 DSM-5-TR criteria: frantic efforts to avoid real/imagined abandonment; unstable intense relationships alternating idealization and devaluation; identity disturbance; impulsivity in >=2 self-damaging areas; recurrent suicidal behavior/gestures/self-mutilation; affective instability (mood reactivity, intense episodic dysphoria);…
>=3 of 7 criteria since age 15: failure to conform to social/legal norms (arrests); deceitfulness (lying, conning); impulsivity; irritability and aggressiveness (fights, assaults); reckless disregard for safety of self/others; consistent irresponsibility (work, finances); lack of remorse; Conduct disorder onset before age 15 (aggression…
Workup / key labs
DSM-5-TR: A pervasive pattern of instability of interpersonal relationships, self-image, and affects, and marked impulsivity, beginning by early adulthood and present in a variety of contexts, with >=5 of the 9 criteria. Diagnosis is clinical; structured interviews (e.g., SCID-5-PD) can aid assessment. May be diagnosed before age 18 if…
DSM-5-TR: (A) >=3 of 7 antisocial criteria since age 15; (B) >=18 years old; (C) Conduct disorder with onset before age 15; (D) Antisocial behavior not exclusively during schizophrenia or bipolar episodes. Psychopathy Checklist-Revised (PCL-R) measures related but narrower construct of psychopathy.; Urine drug screen, breath alcohol;…
Imaging
Not routinely indicated
Not routinely indicated
First-line treatment
Evidence-based psychotherapy is primary — dialectical behavior therapy (DBT), mentalization-based therapy (MBT), transference-focused psychotherapy (TFP), schema therapy, good psychiatric management (GPM); DBT is the most studied, with RCT evidence for fewer self-harm episodes, suicide attempts, ED visits, and hospitalizations, and…
Treat comorbid substance use disorder — often the most modifiable contributor to behavior; Treat comorbid depression, anxiety, and ADHD; avoid stimulants and benzodiazepines when possible; Cognitive behavioral interventions in structured settings (e.g., correctional programs) show modest effect on recidivism; Contingency management;…
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