Which is the most common allergen on the standard tray?
| | Fig. 9.6 Nickel allergic contact dermatitis on the patient’s abdomen due to the presence of nickel in the metal buckle on his pants. The rash had been previously misdiagnosed as a nummular eczema. | The metal nickel, found commonly in costume jewelry, is the most common allergen on the standard tray. Approximately 5.8% of the general population in the United States is sensitized, while patch test clinics around the country note a prevalence rate of 19% in their dermatitis populations (Fig. 9-6). The high rate of sensitization is felt to be secondary to ear piercing, which is why this allergy is more common in females. In men, nickel dermatitis is predominantly of occupational origin.
Zug KA, Warshaw EM, Fowler JF, et al: Patch test results of the North American Contact Dermatitis Group 2005-2006, Dermatitis 20:149–160, 2009.
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