Congratulations to the winner of our September quiz, Parima Laohadtanaphorn, MD, Boston University Medical Center, Allston, Mass. The correct answer to our September challenge was unilateral laterothoracic exanthem (also known as asymmetric periflexural exanthem of childhood). For a complete discussion of this case, see the Off-Center Fold section in the October ARCHIVES (Jhin MH, Eidelman M, Cohen SR, Husain S. Unilateral eruption in a child. Arch Dermatol. 2002;138:1371-1376).