Contact allergy in 330 dermatological patients.

Area of Science:

• Dermatology
• Allergology
• Contact Dermatitis

Background:

• Eczematous lesions and leg ulcers are common dermatological conditions.
• Identifying specific allergens is crucial for effective patient management.
• Standard allergy testing series may not cover all relevant topical substances.

Purpose of the Study:

• To investigate allergic reactions to 27 topical substances in patients with eczematous lesions.
• To determine the prevalence of allergies to specific substances, including those not in standard European series.
• To compare findings with existing literature.

Main Methods:

• Patch testing was performed on 330 patients with eczematous lesions.
• Patients included those with leg ulcers and eczematous dermatitis.
• Reactions to 27 topical substances were recorded and analyzed.

Main Results:

• 54.6% of patients with eczematous dermatitis showed allergic reactions.
• Significant allergies were observed for cetyl alcohol (11.2%), chloramphenicol (10%), and sodium lauryl sulfate (6.4%).
• 85 out of 88 patients with leg ulcers had allergies, with wool alcohol being a noted allergen.

Conclusions:

• Commonly used topical substances can elicit significant allergic reactions in patients with eczematous conditions.
• The European standard series for allergy testing may need revision to include prevalent allergens like cetyl alcohol and sodium lauryl sulfate.
• Further research is warranted to understand the full spectrum of contact allergies in these patient populations.