Pathergy: Sensitivity and Specificity

Introduction: None written. Excerpt from the entry in Behcet Disease:
Sensitivity and specificity not specified

The pathergy test consists of the intradermal puncture of the skin with a 20 gauge or smaller needle 5mm obliquely into the patient's flexor aspect of the avascular forearm skin under sterile conditions and without injecting saline. The test is considered positive when an indurated erythematous small papule or pustule forms within 48 hours.