Narcissism Glossary

Cluster B is not a single diagnosis

🧩 Cluster B is the DSM's name for the grouping of antisocial, borderline, histrionic, and narcissistic personality disorders. Some features overlap in appearance, yet the four diagnoses differ in both criteria and treatment.

The words "Cluster B" alone can judge no one's character, behavior, or dangerousness.

Often seen in situations like these

Big emotions, or heavy conflict, and someone gets stamped 'Cluster B.'

When this happens, try this

💡 Write the actually repeated words and behavior, not the classification's name. A diagnosis belongs to a mental health professional who evaluated the person directly.

Type Diagnostic grouping · not a single diagnosis · Topic Narcissism-adjacent terms · Also known as Cluster B Personality Disorders

Official sources & review information

Standard/jurisdiction DSM-5-TR

View all terms