Patch Testing of Thai Children with Eczema

Pailin  Puangpet; Niorn  Boonpuen; Kasira  Saipornchai; Rungrat  Suchaoin; Pattarida  Poompakdeepan; John  McFadden

doi:10.33192/smj.v75i2.260740

Authors

Pailin Puangpet Occupational and Contact Dermatology Clinic, Institute of Dermatology, Bangkok
Niorn Boonpuen Occupational and Contact Dermatology Clinic, Institute of Dermatology, Bangkok
Kasira Saipornchai Occupational and Contact Dermatology Clinic, Institute of Dermatology, Bangkok
Rungrat Suchaoin Occupational and Contact Dermatology Clinic, Institute of Dermatology, Bangkok
Pattarida Poompakdeepan Occupational and Contact Dermatology Clinic, Institute of Dermatology, Bangkok
John McFadden St John’s Institute of Dermatology, King’s College, London

DOI:

https://doi.org/10.33192/smj.v75i2.260740

Keywords:

Patch test, children, pediatric, eczema, allergic contact dermatitis

Abstract

Objective: To detect contact allergy rate and common allergens in Thai children presented with eczema.

Materials and Methods: A total of 124 children, aged 1-15 years, were patch tested using a pediatric screening series of 16 allergens and relevant additional allergens. Data on clinical presentation, atopic history and test results were collected.

Results: Contact allergy was found in 51 of 124 children (41.1%) presented with all forms of eczema. The common allergens were lanolin alcohol (8.9%), cocamidopropyl betaine (8.1%), nickel sulfate (7.3%), fragrance mix I (5.6%), formaldehyde (5.6%), thimerosal (5.6%), fragrance mix II (4.8%), cobalt chloride (4.0%), methylchloroisothiazolinone/methylisothiazolinone (2.4%), methylisothiazolinone (2.4%) and thiuram mix (2.4%). Nineteen of 50 atopic dermatitis patients (38%) showed positive patch test reactions.

Conclusion: Allergic contact dermatitis is common in children. Both atopic and non-atopic patients can develop contact dermatitis. Patch testing should be performed in children presented with eczema regardless of contact dermatitis history.

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