International study group criteria for the diagnosis of Behçet's disease.
Major criteria
Recurrent oral ulceration
Minor aphthous, major aphthous, or herpetiform ulceration
observed by physician or patient that recurred at least three times in one 12-month period
Recurrent genital ulceration
Aphthous or scarring observed by physician or patient
Eye lesions
Anterior or posterior uveitis or cells in vitreous on slit lamp
Plus two of
examination; or retinal vasculitis observed by ophthalmologist
Minor criteria
Skin lesions
Erythema nodosum observed by physician or patient,
pseudofolliculitis, papulopustular or acneiform nodules (observed by the physician in a postadolescent patient, not receiving corticosteroid treatment)
Positive pathergy test
Read by a physician at 24–48 hours, performed with oblique
insertion of a 20-gauge or smaller needle under sterileconditions