Unilateral atrophoderma of Pasini and Pierini.

Atrophoderma of Pasini and Pierini usually appears as isolated, round to oval depressed areas of otherwise normal-appearing skin. The clinical appearance has been likened to "footprints in the snow" or depressions with "cliff drop" borders. The condition is of unknown cause and most commonly occurs on the back, but it is occasionally seen elsewhere on the body. A literature search revealed only one previous report of unilateral atrophoderma of Pasini and Pierini.