What is Psychopathic Personality Disorder?

"Individuals with psychopathic personality disorder tend to lack empathy for others or concern for the rights and feelings of others; however they may be able to act as though they do and can seem charming at times. It may overlap to some extent with the concepts of psychopathy and antisocial personality disorder and is not currently a personality disorder in the main text of the DSM-IV, though additional research and discussion is under way regarding its future and the treatment of psychopathy in DSM-V (DSM-5). "