Narcissistic personality disorder (NPD) is a personality disorder in which a person is excessively preoccupied with personal adequacy, power, prestige and vanity, mentally unable to see the destructive damage they are causing to themselves and others. It is a cluster B personality disorder.[1]
It is estimated that this condition affects one percent of the population, with rates greater for men. First formulated in 1968, NPD was historically called megalomania, and is a form of severe egocentrism.[2]
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