I know a lot of readers are probably confused about the differences between NPD (narcissistic personality disorder), malignant narcissism and psychopathy. I think this article about malignant narcissism from the website The Narcissistic Life describes the differences in a very clear way much better than I could. They are all at different points on the same spectrum, according to most experts.
Malignant Narcissism: http://thenarcissisticlife.com/malignant-narcissism/
Lucky Otters Haven 
Christine Louis de Canonville just wrote a book entitled, “The three faces of evil: unmasking the full spectrum of narcissistic abuse” which does an excellent job explains the areas of overlap and the differenc s between these 3 diagnoses.
LikeLike