Modern Narcissism and Buddhism

I was reading about Narcissistic Personality Disorder and related conditions like Borderline Personality Disorder . Some qualities seemed in direct opposition to what I've read in books by Thich Nhat Hanh. I was wondering if there were descriptions of Modern Psychological Narcissism in Buddhist works (as opposed to vanity in the Greek myth)? Is it closely tied to notions of Ego? For example, we are encouraged to cultivate Equanimity in Buddhism. BPD has erratic and extreme emotional shifts. Its sufferers have extremely dichotomous, dualistic thinking. Some notion of objectivity is encouraged in Buddhism, a realization that one is observing a phenomenon, and one may have thoughts, judgments, etc about the phenomenon, but this isn't really the thing being observed. People with NPD and the like may be considered extremely subjective, unmindful that they are having opinions and so failing to distinguish between the observation and the judgments. Envy is extremely common among narcissists. On the path to liberation, envy is one of the first emotions to disappear. Are there teachings of Buddhism that could be especially helpful for such people?