Tender erythematous plaques on legs.

A 54-year-old woman complained of tender, non-pruritic plaques on both legs which had erupted 2 weeks earlier. These lesions were accompanied with arthralgia, weakness, and fever. No other symptoms suggesting infection were referred such as diarrhoea, abdominal pain or sore throat. Her past medical history revealed chronic hypertension, which was well controlled with enalapril 5 mg daily, and right mastectomy due to carcinoma 15 years earlier. Clinical examination revealed 7 cm to 10 cm diameter circumscript, infi ltrated, erythematous coalescent plaques on both legs. Some isolated papules were observed (Fig. 1). No lymphadenopathies were found. The maximum level of temperature reached was 39.4 oC. Pharyngeal swab was collected for bacteriological study, and no positive result was obtained.