A pattern of grandiosity, need for admiration, and lack of empathy. (ncbi.nlm.nih.gov/books/nbk556001/)

Narcissistic personality disorder (NPD) is a personality disorder characterized by a life-long pattern of exaggerated feelings of self-importance, an excessive need for admiration, and a diminished ability to empathize with other people's feelings. Narcissistic personality disorder is one of the sub-types of the broader category known as personality disorders...