Nickel contact hypersensitivity in children

Area of Science:

• Dermatology
• Allergology
• Pediatrics

Background:

• Nickel allergic contact dermatitis (NACD) is the most prevalent allergy in North America, with a 14.3% incidence.
• NACD incidence has risen from 10% a decade ago, presumed due to increased environmental nickel exposure, particularly from costume jewelry and belt buckles.
• Pediatric patients with a history of umbilical or wrist dermatitis, or a family history of NACD, were studied.

Purpose of the Study:

• To investigate the prevalence and predictors of nickel allergy in pediatric patients.
• To evaluate the utility of patch testing in identifying nickel allergy in at-risk children.
• To inform early nickel avoidance strategies for children, especially those with atopic dermatitis.

Main Methods:

• A cohort of 30 pediatric patients with a history of dermatitis or family history of NACD underwent patch testing with nickel sulfate 5%.
• Presence of id reactions and the nature of patch test reactions (papular) were recorded.
• Statistical analysis was performed to identify predictors of NACD.

Main Results:

• All 30 pediatric patients exhibited positive patch tests to nickel sulfate.
• Fifty percent of patients experienced an id reaction, with papular reactions consistent with their patch tests.
• A positive family history of NACD was identified as a potential positive predictor for developing the allergy.

Conclusions:

• Patch testing for nickel allergy is highly effective in pediatric patients with umbilical dermatitis and id reactions.
• Family history may predict the development of NACD, highlighting the importance of nickel avoidance in atopic children.
• Early identification of nickel reactivity enables timely intervention and nickel avoidance, crucial for managing this prevalent allergy.