Tags: Disease.
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 to others in the process. It is estimated that this condition affects one percent of the population. First formulated in 1968 NPD was historically called megalomania and is a form of severe egocentrism.
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