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Related Experiment Videos

False-positive tuberculin test in Behçet's syndrome

N Kaplinsky, M Movshovits, O Frankel

    Cutis
    |May 1, 1980
    PubMed
    Summary

    Behçet's syndrome can manifest uniquely, causing pustules at needle puncture sites. This case highlights how a positive tuberculin test reaction in such patients may be misinterpreted as tuberculosis.

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    Area of Science:

    • Immunology
    • Dermatology
    • Ophthalmology

    Background:

    • Behçet's syndrome is a rare multisystem inflammatory disorder.
    • Characteristic symptoms include oral ulcers, genital ulcers, skin lesions, and eye inflammation.
    • The syndrome's presentation can be variable and sometimes mimics other conditions.

    Observation:

    • The patient presented with uveitis and erythema nodosum, indicative of Behçet's syndrome.
    • Every needle puncture on the patient's skin resulted in a pustule formation.
    • A tuberculin skin test was strongly positive due to the pustule reaction at the puncture site.

    Findings:

    • The positive tuberculin test was a direct result of the pathergy phenomenon in Behçet's syndrome, not tuberculosis.
    • The patient eventually developed the full spectrum of Behçet's disease symptoms.
    • This case underscores the diagnostic challenge posed by the pathergy phenomenon.

    Implications:

    • Misinterpretation of the tuberculin test could lead to incorrect diagnosis and treatment.
    • Awareness of the pathergy phenomenon is crucial for accurate diagnosis of Behçet's syndrome.
    • Early recognition of atypical presentations can prevent diagnostic delays and improve patient outcomes.

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