Allergic contact dermatitis due to topical application of corticosteroids: review and clinical implications.

Allergy due to topically applied corticosteroids is being recognized more frequently. Testing for hypersensitivity to these agents is performed with delayed hypersensitivity patch testing. Cross-reactivity among topically administered corticosteroids is frequent and often can be predicted on the basis of additional patch testing and an established classification scheme. Herein we review allergy due to topically applied corticosteroids with regard to its prevalence, means of testing, cross-reactivity among the subclasses, risk factors, and relationship to steroids.