Crohn's disease - Symptoms and causes

5.2K views · 26 reactions | The pathergy test is a skin hypersensitivity test that checks for an exaggerated response to minor skin trauma by inserting a sterile needle and looking for a papule or pustule to form at the puncture site within 24-48 hours. It is primarily used in the diagnosis of Behçet disease, though it is a non-specific test that can also be positive in other conditions like pyoderma gangrenosum. | Dr.GR-RahiMoon-Medical Specialist | Facebook