This video answers the questions: What is a malignant narcissist? How does malignant narcissism manifest in work settings? Malignant narcissism is a construct is not well studied, but in general refers to an individual has a combination of characteristics related to narcissistic personality disorder, antisocial personality disorder, paranoia, and ecosyntonic sadism in aggression.
Psychopathy: There are two types of psychopathy: Factor 1 (primary, interpersonal affective) and Factor 2 (lifestyle, antisocial) psychopathy. Factor 1 psychopathy has characteristics like grandiosity, pathological lying, manipulation, a superficial charm, callous, unemotional, low neuroticism and lack of guilt or remorse. Factor 2 psychopathy has a parasitic lifestyle, being prone to boredom, sensation seeking, impulsivity, irresponsibility, a failure to have long term goals, poor behavioral controls, and criminal versatility.
Narcissism: There are two types of narcissism: With grandiose narcissism we see characteristics like being extroverted, socially bold, self-confident, having a superficial charm, being resistant to criticism, and being callous and unemotional. Vulnerable narcissism is characterized by shame, anger, aggression, hypersensitivity, a tendency to be introverted, defensive, avoidant, anxious, depressed, socially awkward, and shy.
https://www.ncbi.nlm.nih.gov/pubmed/20856182
Kernberg OF: Severe Personality Disorders. New Haven, CT: Yale University Press, 1984.
Kernberg OF: Aggression in Personality Disorders and Perversions. New Haven: Yale University Press, 1992.
Kernberg OF: Aggressivity, Narcissism, and Self- Destructiveness in the Psychotherapeutic Relationship. Yale University Press, 2004.
Source: https://www.youtube.com/watch?v=JP0oTFxYo_U&list=LL2fjDQpMo4ZW7KlvunRA-UA&index=20&t=1196s