Is borderline personality disorder a mood disorder?

  title={Is borderline personality disorder a mood disorder?},
  author={Gordon Parker},
  journal={The British journal of psychiatry : the journal of mental science},
Borderline personality disorder is by its very naming positioned as an Axis II personality disorder and thus seemingly distinct from an Axis I mood state. Clinical differentiation of those with a borderline condition and those with a bipolar disorder is commonly held to be difficult, so raising the question as to whether they may be independent or interdependent conditions, and allowing several possible answers.