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Do positive nickel reactions increase nonspecific patch test reactivity?

K Lammintausta, K Kalimo

    Contact Dermatitis
    |March 1, 1987
    PubMed
    Summary
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    Nickel allergy in women is often linked to cobalt, chromate, and PPDA allergies. While some reactions overlap, others like formaldehyde and wood tars show distinct patterns in nickel-sensitive individuals.

    Area of Science:

    • Dermatology
    • Allergology
    • Contact Dermatitis Research

    Background:

    • Nickel allergy is a common contact hypersensitivity.
    • Understanding cross-reactivity patterns is crucial for accurate diagnosis and management.

    Purpose of the Study:

    • To compare patch test reaction patterns in nickel-positive and nickel-negative female patients.
    • To investigate the co-occurrence of allergies to other common contact allergens in relation to nickel sensitivity.

    Main Methods:

    • Patch testing was performed on female patients.
    • Reaction patterns to various allergens were analyzed and compared between nickel-positive and nickel-negative groups.
    • Statistical analysis (p-values) was used to determine significance.

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    Main Results:

    • Cobalt allergy was present in 24.8% of nickel-positive patients.
    • Allergies to chromate and PPDA were significantly more common in nickel-sensitive patients.
    • Formaldehyde, cobalt, and chromate elicited more reactions in nickel-positive patients, while wood tars were more reactive in nickel-negative patients.
    • Follicular reactions were particularly noted in patients with combined nickel and cobalt allergies.

    Conclusions:

    • Nickel sensitivity is associated with a higher prevalence of cobalt, chromate, and PPDA allergies.
    • Specific allergens like formaldehyde and chromate show increased reactivity in nickel-allergic individuals.
    • The study highlights the complex interplay of contact allergies and the importance of comprehensive patch testing.