Behcet's Syndrome Criteria Calculator

Behcet's Syndrome Criteria Calculator for Rheumatology. Four or more meets the ICBD classification threshold. A lower total is not a definitive exclusion and a higher one is not a specific laboratory diagnosis. The original multinational study evaluated classification performance, not this software.

For shared guidance on choosing a tool and documenting results, read the clinical calculator workflow.

How this calculator works

The 2014 ICBD system gives two points each for oral aphthosis, genital aphthosis and ocular lesions, and one each for skin, neurological and vascular manifestations. A positive pathergy test adds one; the test is optional.

When to use this calculator

Use after clinical review of relevant manifestations and plausible mimics. Distinguish this version from older criteria that require oral ulcers or use different weights. Eye findings require appropriate specialist assessment, not a self-labelled red eye.

Inputs used

  • Clinically attributed oral, genital, ocular, skin, neurological and vascular manifestations, plus a positive, negative or unperformed optional pathergy test.

Clinical interpretation

Four or more meets the ICBD classification threshold. A lower total is not a definitive exclusion and a higher one is not a specific laboratory diagnosis. The original multinational study evaluated classification performance, not this software.

Worked example

Oral and genital aphthosis contribute two plus two, reaching four even without pathergy testing. Oral aphthosis plus a qualifying skin manifestation give three; a positive pathergy test raises that result to four.

Limitations and safety notes

Incorrect attribution of common ulcers or skin lesions can inflate the score. Optional pathergy is not the same as an unknown mandatory manifestation. New visual, neurological or vascular symptoms require assessment regardless of how many points are present.

References

  • https://pubmed.ncbi.nlm.nih.gov/23441863/

Editorial review and citation methodology

Maintained by the Quick Medical Calculator Editorial Team. Content record date: September 9, 2026. A content date is not evidence of independent clinical review. Individual clinical sign-off is not recorded on this page.

  • Prefer original validation studies for scoring systems and prediction tools.
  • Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
  • Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.

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