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Ultrastructural evaluation of mid‐dermal elastolysis

Mid‐dermal elastolysis is a well‐defined clinical and histopathologic entity manifested by fine wrinkling of the skin and a mid‐dermal loss of elastic fibers. Ulfrastructural and hislologic studies were performed in an attempt to better define the cause of the elastolytic process. Biopsy specimens from the lesions of 3 patients with mid‐dermal elasiolysis were studied at light and electron microscopic levels. Ultrastructural evidence of normal elastic fiber engulfment by activated macrophages was observed; however, some fields also demonstrated envelopment of abnormally degenerated elastic tissue. Although there are many potential causes of this degeneration, photodistribution of the lesions suggests that ultraviolet damage is a primary inciting factor.