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Screening patch tests for pigmented contact dermatitis in Israel.

A Trattner¹, E Hodak, M David

¹Department of Dermatology, Rabin Medical Center, Petah Tiqva, Israel.

Contact Dermatitis

|March 12, 1999

Summary

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Screening patch tests identified common causes of pigmented contact dermatitis. The standard and photo series proved most effective for diagnosing this skin condition.

Area of Science:

Dermatology
Allergology
Contact Dermatitis

Background:

Pigmented contact dermatitis (PCD) is a skin reaction linked to various allergens like fragrances, cosmetics, dyes, and rubber.
Identifying causative agents is crucial for effective patient management.

Purpose of the Study:

To evaluate the diagnostic yield of different screening patch test series in an unselected group of patients with PCD.
To determine the most effective patch test series for identifying allergens in PCD.

Main Methods:

A 2-year prospective study involving 29 patients diagnosed with pigmented contact dermatitis.
Screening patch tests were performed using standard, cosmetic, fragrance, Scandinavian photo, and personal product series.

Main Results:

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21 out of 29 patients (72%) showed positive reactions to at least one allergen.
The standard series yielded 16 positive reactions, while the photo series yielded 9.
Relevant results, indicating causative allergens, were obtained in 16 patients (55%).

Conclusions:

The standard and photo patch test series are the most effective for screening patients with pigmented contact dermatitis.
Comprehensive patch testing aids in identifying allergens responsible for PCD, improving treatment outcomes.