Diagnostic quiz: hypopigmented patches
A 10-year-old African American boy was referred by his pediatrician to a dermatologist. The patient has hypopigmented patches on his check and chin. He has experienced erythematous lesions followed by areas of nonpruritic smooth scales that vary in size. Normally the patches are not as noticeable as they are now; however, with sun exposure during the summer months, they become prominent in color. The boy has a family history of atopic dermatitis.