ISG 1990 Criteria (Behçet Disease)
International Study Group criteria for Behcet disease (ISG 1990): recurrent oral ulceration plus ≥ 2 of recurrent genital ulceration, eye lesions, skin lesions, and a positive pathergy test.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Recurrent oral ulceration
- Yes
- Recurrent genital ulceration
- Yes
- Eye lesions
- Yes
- Skin lesions
- No
- Positive pathergy test
- No
Result: Meets ISG criteria for Behcet disease — recurrent oral ulceration plus 2 of 4 minor criteria.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Meets
- Recurrent oral ulceration (mandatory) plus >= 2 of genital ulceration, eye lesions, skin lesions, or positive pathergy.
- Does not meet
- Mandatory oral ulceration absent, or fewer than 2 minor criteria. A classification, not a treatment order.
What you enter
- Recurrent oral ulceration
- Recurrent genital ulceration
- Eye lesions (uveitis / retinal vasculitis)
- Skin lesions
- Positive pathergy test
How this is calculated
International Study Group for Behcet’s Disease. Criteria for diagnosis of Behcet’s disease. Lancet. 1990;335(8697):1078-1080. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.