Narcissistic personality disorder

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Narcissistic personality disorder
 
 
By Mayo Clinic Staff

Narcissistic personality disorder is a mental disorder in which people have an inflated sense of their own importance, a deep need for admiration and a lack of empathy for others. But behind this mask of ultraconfidence lies a fragile self-esteem that's vulnerable to the slightest criticism.

http://www.mayoclinic.org/diseases-conditions/narcissistic-personality-disorder/basics/definition/con-20025568