Cutaneous Langerhans cell histiocytosis in an elderly woman.

Langerhans cell histiocytosis (LCH) is a clonal proliferative disorder of Langerhans cells typically seen in infants and children. Rare adult cases usually have systemic involvement. We report an uncommon case of skin-limited LCH in an elderly woman, who is to our knowledge one of the oldest patients reported with this condition.