Porokeratosis punctata palmaris et plantaris (punctate porokeratosis). Case report and literature review.

A case of porokeratosis punctata palmaris et plantaris (punctate porokeratosis) in a 60-year-old man of Korean ancestry is reported. The patient presented with a 15-year history of numerous asymptomatic pits measuring 1 to 3 mm in diameter and having keratotic plugs irregularly distributed on the plantar aspects of both feet and on the palmar aspects of both hands, including the flexor portions of the digits. Histologic examination revealed distinct epidermal depressions containing cornoid lamellae. Six previous case reports of this unusual dermatosis are reviewed and compared to our case.