Table I.

Diagnostic criteria of Behçet disease defined by the International Study Group (ISG)

Criterion	Description
Recurrent oral ulceration	Minor aphthous, major aphthous, or herpetiform ulceration observed by physician or patient that recurred at least 3 times in one 12-month period
Recurrent genital ulceration	Aphthous ulceration or scarring observed by physician or patient
Eye lesions	Anterior uveitis, posterior uveitis, cells in vitreous on slit lamp examination, or retinal vasculitis observed by ophthalmologist
Cutaneous lesions	Erythema nodosum, pseudofolliculitis, papulopustular lesions, or acneiform nodules observed by physician in postadolescent patient not receiving corticosteroid treatment
Positive pathergy test	Read by physician at 24 to 48 h