A. The general criteria for personality disorder (F60) must be met.
B. At least four of the following must be present:
1) Excessive sensitivity to setbacks and rebuffs;
2) Tendency to bear grudges persistently, e.g. refusal to forgive insults, injuries, or slights;
3) Suspiciousness and a pervasive tendency to distort experience by misconstruing the neutral or friendly actions of others as hostile or contemptuous;
4) A combative and tenacious sense of personal rights out of keeping with the actual situation;
5) Recurrent suspicions, without justification, regarding sexual fidelity of spouse or sexual partner;
6) Persistent self-referential attitude, associated particularly with excessive self importance;
7) Preoccupation with unsubstantiated ‘conspiratorial’ explanations of events either immediate to the patient or in the world at large.