DSM-5 includes 10 personality disorders that are divided into three clusters: Cluster A (odd or eccentric) includes paranoid, schizoid, and schizotypal personality disorders; Cluster B (dramatic, emotional, or erratic) includes antisocial, borderline, histrionic, and narcissistic personality disorders; and Cluster C (anxious or fearful) includes avoidant, dependent, and obsessive-compulsive personality disorders These personality disorders represent long-standing and ingrained ways of thinking, feeling, and behaving that can cause significant distress. Because people may display two or more of these maladaptive ways of interacting with the world, considerable disagreement remains over how to categorize personality disorders. Treating people with personality disorders is often difficult because they usually do not see that their difficulties are a result of the way they relate to others.
