The correct answer to our January challenge was aggressive digital papillary adenocarcinoma. For a complete discussion of this case, see the Off-Center Fold section in the February Archives (Lowther C, Ricotti C, Thomas C, Cockerell CJ. A nontender nodule on the tip of the left index finger. Arch Dermatol. 2010;146:191-196).
Be sure to visit the Archives of Dermatology Web site (http://www.archdermatol.com) to try your hand at the interactive quiz. We invite visitors to make a diagnosis based on selected information from a case report or other feature scheduled to be published in the following month's print edition of the Archives. The first visitor to e-mail our Web editors with the correct answer will be recognized in the print journal and on our Web site and will also receive a free copy of The Art of JAMA II.
January 2010 Archives Web Quiz Winner. Arch Dermatol. 2010;146(4):436. doi:10.1001/archdermatol.2010.23