Can atopy patch tests with aeroallergens be an additional diagnostic criterion for atopic dermatitis?

Area of Science:

• Dermatology
• Allergology
• Immunology

Background:

• Atopic dermatitis (AD) presents complex pathomechanisms leading to varied clinical presentations and diagnostic challenges.
• Identifying specific triggers is crucial for effective AD management.

Purpose of the Study:

• To evaluate the diagnostic utility of atopy patch tests (APT) for aeroallergens in adult patients with atopic dermatitis.
• To assess the prevalence of hypersensitivity to common aeroallergens in AD patients.

Main Methods:

• A study involving 115 adult AD patients and 98 healthy controls.
• Application of APTs for cat dander, birch pollen, house dust mites, and grass pollen allergens.
• Comparison of positive reaction rates between AD patients and the control group.

Main Results:

• A positive reaction to at least one aeroallergen was observed in 53.9% of AD patients versus 6.2% in controls (p<0.001).
• House dust mite allergens were the most frequent cause of hypersensitivity (45.2%).
• Polyvalent allergy (2-4 allergens) was found in 56.5% of patients, with test specificity exceeding 75%.

Conclusions:

• Atopy patch tests demonstrate significant specificity and confirm the role of polyvalent contact hypersensitivity to aeroallergens in AD.
• Positive aeroallergen APT results in a majority of AD patients support their use as an additional diagnostic criterion.