What is narcissism and narcissistic personality disorder?

Narcissism is on a very wide spectrum where at one end is healthy narcissism and at the other end is malignant narcissism characterized by varying degrees of sadism, paranoia and psychopathy.
Narcissism is on a very wide spectrum where at one end is healthy narcissism and at the other end is malignant narcissism characterized by varying degrees of sadism, paranoia and psychopathy.