Cluster B — what it means

The DSM-5 grouping for the four "dramatic, emotional, or erratic" personality disorders: Narcissistic, Borderline, Histrionic, and Antisocial. The disorders this site reflects on are all in this cluster.

What it looks like

When a clinician says "there's a Cluster B presentation here," they mean the relationship pattern looks like one or more of NPD, BPD, HPD, or ASPD — usually with overlap between them rather than a clean single label.

Related reading

Related terms

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