Superimposed linear atopic dermatitis treated with dupilumab.

Common polygenic skin disorders, such as atopic dermatitis, may rarely present in a segmental or linear distribution due to cutaneous mosaicism. Only seven cases of superimposed linear atopic dermatitis have been reported to date. Here, we present a child with severe superimposed linear atopic dermatitis and highlight the first successful use of dupilumab in its treatment.