In the world of Cluster B personality disorders, NPD (Narcissistic Personality Disorder) and BPD (Borderline Personality Disorder) are often called "cousins" because they can look identical on the surface, especially during a blowout argument.
Is it Narcissism (NPD) or Borderline Personality Disorder (BPD)? Self-aware narcissist Lee Hammock breaks down the core differences in 2026. Learn why one is driven by ego/admiration and the other by a desperate fear of abandonment.
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