Multiple dermatofibromas associated with lupus profundus

We report a 58-year-old Afro-Caribbean woman who presented with more than 20 dermatofibromas on the body particularly on the back, arms and legs. These developed spontaneously over the course of 5 years. She also had a long-standing 5 x 2-cm area of lipoatrophy on the right upper arm and a 2-year history of several inflammatory subcutaneous nodules developing on the upper chest and left breast. These were confirmed histologically as lupus profundus. Apart from a mild arthritis, she had no other markers for systemic lupus erythematosus and was systemically well. Multiple dermatofibromas are rare. There are around 30 reports of multiple dermatofibromas associated with systemic diseases. More than half of these cases were associated with systemic lupus erythematosus, with or without systemic steroid therapy and about one-third were associated with HIV infection. Although the mechanism is unknown, it appears that multiple dermatofibromas are associated with autoimmune diseases or altered immune states. This is the first case of multiple dermatofibromas associated with lupus profundus. The knowledge of such associations may contribute to the understanding of the pathogenesis of dermatofibromas, which is as yet unknown.