The DSM-IV lists ten personality disorders, grouped into three clusters in Axis II. The DSM also contains a category for behavioral patterns that do not match these ten disorders, but nevertheless exhibit characteristics of a personality disorder. This category is labeled Personality disorder not otherwise specified.
Cluster A (odd or eccentric disorders)
Paranoid personality disorder (DSM-IV code 301.0): characterized by irrational suspicions and mistrust of others.
Cluster B (dramatic, emotional or erratic disorders)
Schizoid personality disorder (DSM-IV code 301.20): lack of interest in social relationships, seeing no point in sharing time with others, anhedonia, introspection.
Schizotypal personality disorder (DSM-IV code 301.22): characterized by odd behavior or thinking.
Antisocial personality disorder (DSM-IV code 301.7): a pervasive disregard for the law and the rights of others.
Cluster C (anxious or fearful disorders)
Borderline personality disorder (DSM-IV code 301.83): extreme "black and white" thinking, instability in relationships, self-image, identity and behavior often leading to self-harm and impulsivity. Borderline personality disorder is diagnosed in three times as many females as males.
Histrionic personality disorder (DSM-IV code 301.50): pervasive attention-seeking behavior including inappropriately seductive behavior and shallow or exaggerated emotions.
Narcissistic personality disorder (DSM-IV code 301.81): a pervasive pattern of grandiosity, need for admiration, and a lack of empathy.
Avoidant personality disorder (DSM-IV code 301.82): social inhibition, feelings of inadequacy, extreme sensitivity to negative evaluation and avoidance of social interaction.
Appendix B: Criteria Sets and Axes Provided for Further Study
Dependent personality disorder (DSM-IV code 301.6): pervasive psychological dependence on other people.
Obsessive-compulsive personality disorder (not the same as obsessive-compulsive disorder) (DSM-IV code 301.4): characterized by rigid conformity to rules, moral codes and excessive orderliness.
Appendix B contains the following disorders. They are still widely considered amongst psychiatrists as being valid disorders, for example by Theodore Millon.
Depressive personality disorder – is a pervasive pattern of depressive cognitions and behaviors beginning by early adulthood.
Passive-aggressive personality disorder (negativististic personality disorder) – is a pattern of negative attitudes and passive resistance in interpersonal situations.
The following disorders are still considered to be valid disorders by Millon. They were in DSM-III-R but were deleted from DSM-IV. Both appeared in an appendix entitled “Proposed diagnostic categories needing further study”, and so did not have any concrete diagnostic criteria.
Sadistic personality disorder – is a pervasive pattern of cruel, demeaning and aggressive behavior.
Self-defeating personality disorder (masochistic personality disorder) – is characterised by behaviour consequently undermining the person's pleasure and goals.