Eccrine nevus with epidermal changes.

A 22-year-old woman with papular lesions on the extensor aspect of the left leg, present since childhood, with linear distribution is described. Histology of the lesion showed malformed eccrine sweat apparatus with ductal hyperplasia, in addition to the serrated configuration of the epidermis. It appears that the lesions of the eccrine apparatus in this case represent a nevus.