histrionic personality disorder

**Definition (DSM-5):** A pervasive pattern of excessive emotionality and attention-seeking beginning by early adulthood, present in multiple contexts, with ≥5 of the following: - Uncomfortable when not the center of attention - Inappropriately sexually seductive or provocative behavior - Rapidly shifting, shallow expression of emotions - Uses physical appearance to draw attention to self - Impressionistic, vague, non-detailed speech - Self-dramatization, theatrical, exaggerated emotional expression - Suggestible (easily influenced by others or circumstances) - Considers relationships more intimate than they actually are

**Cluster classification:** Cluster B ("dramatic, emotional, erratic"), along with antisocial, borderline, and narcissistic personality disorders. Cluster A = odd/eccentric (paranoid, schizoid, schizotypal); Cluster C = anxious/fearful (avoidant, dependent, obsessive-compulsive).

**Epidemiology/etiology:** Prevalence is roughly 1–2%. Historically diagnosed more often in women, though this may reflect gender bias in diagnosis and presentation. Etiology is multifactorial (genetic/temperament and early environmental factors). Personality disorders are ego-syntonic: patients typically do not see their behavior as problematic and seek care for related problems (depression, somatic complaints, relationship difficulties).

**Defense mechanisms (high-yield):** Repression, regression, dissociation, somatization, and splitting. Dramatic displays can mask underlying fear of abandonment or low self-worth.

**Clinical vignette pattern:** A flamboyantly dressed patient who flirts with the physician, speaks in broad, vague impressions ("it was just awful, you know?"), expresses emotion theatrically, and becomes upset when attention shifts away. May claim to have a close relationship with the physician after a brief encounter.

**Differential/key distinctions:** - **Borderline:** Unstable self-image, intense unstable relationships with idealization/devaluation, chronic emptiness, self-harm and suicidality, and marked abandonment fears. HPD has less self-destructive behavior and less identity disturbance. - **Narcissistic:** Needs admiration and grandiosity, lacks empathy. HPD seeks attention and approval, and can show empathy. - **Antisocial:** Disregard for others' rights, conduct disorder before age 15. - **Dependent:** Submissive and clingy, with a need to be taken care of. HPD is attention-seeking and dramatic. - **Somatic symptom disorder, mania:** Consider if symptoms are episodic rather than lifelong.

**Management:** - First-line is long-term psychotherapy (psychodynamic therapy, supportive therapy, CBT). Group therapy can help with interpersonal patterns. - Pharmacotherapy is only for comorbid conditions (e.g., depression, anxiety). No medication treats HPD itself. - Physician approach: maintain professional boundaries, be calm and empathetic, set clear limits, avoid reacting to seductive behavior, and use a chaperone when appropriate.

**Comorbidities:** Major depressive disorder, somatic symptom disorders, conversion disorder, and other Cluster B personality disorders. Patients are at risk of frequent healthcare use and relationship instability.