[Anetoderma with positive Borrelia serology].

Anetoderma is an uncommon disease characterized by multiple circumscribed atrophic, herniated skin lesions on trunk, thighs and upper arms caused by loss of elastic fibers. Associations with autoimmune diseases or infections, especially spirochetal infections, have been described. We report a case of anetoderma with an increased serum Borrelia burgdorferi IgM-titers. After treatment with doxycycline 200 mg/day for three weeks, the progression of the disease stopped and no new lesions appeared.