Acquired elastotic hemangioma-like changes and eccrine sweat duct squamous metaplasia in lichen simplex chronicus/prurigo nodularis-like lesions of the knee and elbow.

While AEH represents a distinctive clinicopathological variant of hemangioma characteristically appearing on sun-exposed areas of middle-aged or elderly patients, the herein described lesions seem to be non-neoplastic epithelial, vascular and eccrine sweat duct reactive changes which are likely to be associated with chronic pressure or repeated mechanical stimulation with a marked predilection for the knee and elbow.