The "A-B-C's" of the cluster B's: identifying, understanding, and treating cluster B personality disorders.

This article is a summary of some of the more recent research on the diagnosis, etiology, and treatment of Cluster B personality disorders (antisocial, histrionic, borderline, and narcissistic). Research on psychological, psychosocial, and biological perspectives of these disorders is presented. Individual psychotherapy, group psychotherapy, and other forms of multi-person therapies are also discussed. Finally, perspectives on issues of countertransference when treating these personality-disordered patients are addressed.