Congratulations to the winner of our July quiz, Johann E. Gudjonsson, MD, PhD, Department of Dermatology, University of Michigan, Ann Arbor. The correct answer to our July challenge was verruciform xanthoma. For a complete discussion of this case, see the Off-Center Fold section in the August Archives (Borer M, Smith J, White B, Sheehan D. A scaly plaque on the scalp. Arch Dermatol. 2007;143:1067-1072).