One of the unfortunate things about the current state of personality disorder diagnosis is that there are too many different competing systems. Each system is more or less internally consistent, but ...

Narcissistic personality disorder (NPD) is 1 of 10 clinically recognized personality disorders. Though NPD is only one official diagnosis, doctors further classify the condition into 2 types.

Borderline personality disorder (BPD) and narcissistic personality disorder (NPD) are two separate personality disorders that may be confused with one another. They share some similarities but have ...

Schizotypal personality disorder and schizophrenia have numerous similarities. However, both have differences in their symptoms and diagnostic criteria. Schizotypal personality disorder (STPD) and ...