Pitted keratolysis is a superficial bacterial infection of the skin. Corynebacteria infection of the skin is generally the cause although other bacteria have been isolated. Clinically there are many skin coloured, punched out depressions measuring 2 to 30 mm in diameter. The most common localization is the plantar skin where pressure bearing areas, are most involved. Palmar lesions are very rare. Here we report a patient with pitted keratolysis associated with palmar hyperhidrosis developing after using battery heated hand warmer. Dermatoscopic examination revealed nu-merous black circles in a parallel pattern on the ridges of the skin markings. To our knowledge, the dermatoscopic features of pitted keratolysis have not been described previously.
Keywords: Dermatoscopy, hyperhidrosis, pitted keratolysis
