Syringolymphoid hyperplasia with alopecia.

A 26-year-old man presented with an unusual skin lesion consisting of a hairless area on the left leg studded with reddish-brown papules, together with follicular hyperkeratosis and circumscribed anhidrosis. Skin biopsies showed dense lymphocytic infiltrates in the dermis and around hyperplastic sweat ducts and glands. Similar clinical and histological features have been described in two previous case reports. We propose the term syringolymphoid hyperplasia with alopecia for this unusual skin disease.