antisocial personality disorder

**DEFINITION / DSM-5-TR CRITERIA** - Pervasive pattern of disregard for and violation of the rights of others since age 15, with ≥3 of the following: 1. Failure to conform to social norms/lawful behavior (repeated arrests) 2. Deceitfulness (lying, conning, aliases) 3. Impulsivity/failure to plan ahead 4. Irritability and aggressiveness (repeated fights/assaults) 5. Reckless disregard for safety of self or others 6. Consistent irresponsibility (job/financial obligations) 7. Lack of remorse (indifference to or rationalization of harming others) - Patient must be ≥18 years old. - Evidence of conduct disorder with onset before age 15 (the childhood precursor; "CD → ASPD"). - Behavior not occurring exclusively during schizophrenia or bipolar disorder (mania).

**EPIDEMIOLOGY / RISK FACTORS** - Male > female (about 3:1). - Higher prevalence in prison populations and substance use treatment settings. - Risk factors: childhood abuse/neglect, harsh or inconsistent parenting, family history of ASPD, ADHD or conduct disorder in childhood, and a family history of substance use disorder. Heritable component (twin/adoption studies). - Neurobiology: reduced prefrontal cortex (orbitofrontal/ventromedial) volume and function, and amygdala hypoactivity (impaired empathy, fear conditioning, and decision-making). Low autonomic arousal and low serotonin are also implicated.

**CLINICAL FEATURES** - Superficial charm, manipulation, and lack of guilt. Often present to the clinic through legal or court mandates or for secondary gain (e.g., drug-seeking, malingering). - High comorbidity with substance use disorders, other personality disorders, depression, and anxiety. - Higher rates of early mortality (violence, accidents, suicide). - Defense mechanisms: acting out, splitting, projection, and denial.

**DIFFERENTIAL DIAGNOSIS** - Conduct disorder: the same pattern in a patient <18 years. If criteria are met at 18 and the patient has a history of CD, the diagnosis is ASPD. - Other Cluster B disorders (borderline: unstable relationships and self-harm; narcissistic: grandiosity and need for admiration, with less criminality; histrionic: attention-seeking). - Bipolar disorder (mania), substance-induced behavior, and malingering. Antisocial behavior only during these episodes is not ASPD. - Psychopathy (Hare Psychopathy Checklist) is a related construct with more emphasis on affective traits (callousness, shallow affect, lack of empathy). It is not a separate DSM diagnosis.

**MANAGEMENT** - Treatment is difficult, and patients rarely seek it voluntarily. There is no FDA-approved medication. - Psychotherapy (limited evidence): CBT-based and structured programs, and contingency management when substance use is comorbid. - Pharmacotherapy is symptom-targeted only (e.g., mood stabilizers or SSRIs for impulsivity/aggression; atypical antipsychotics for severe aggression). Treat comorbid substance use disorders. - Boards pearl: the best next step is usually to set firm limits and boundaries, and to treat comorbid conditions.

**HIGH-YIELD BOARD ASSOCIATIONS** - The Cluster B personality disorders ("wild/dramatic/erratic") are antisocial, borderline, histrionic, and narcissistic. - Cluster A ("weird"): paranoid, schizoid, schizotypal. Cluster C ("worried"): avoidant, dependent, obsessive-compulsive personality disorder. - Personality disorders are ego-syntonic (the patient is not distressed by their traits), unlike ego-dystonic disorders such as OCD. - Conduct disorder in childhood (cruelty to animals, fire-setting, truancy, bullying) → ASPD in adulthood. Often tested alongside the "Macdonald triad" (enuresis, fire-setting, animal cruelty), which has weak predictive validity and is of limited use. - Some patients' antisocial behavior improves with age ("burnout") after the 4th decade.