Abstract:  A 70-year-old male presented with erythema in the left crus for more than 10 years, and extended to all over the body with pruritus for 3 months. Dermatological examination showed widespread, symmetric, dull red patches and plaques on the limbs. The lesions on the trunk were scales. Histopathological features were in accordance with the diagnosis of mycosis fungoides. The patient was treated with recombinant interferon α2b intromuscular injection, 300MIU, three times a week, methotrexate 10 mg, once a week, and NB-UVB once a week. After treatment for one year,  the lesions were  improved markedly.

Key words: pigmented purpuric dermatoses, mycosis fungoides