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To the editor:We report a 23-year-old Chinese man,who presented with a 2-month history of recurrent eruptions of asymptomatic,red,necrotic papules on his face and extremities.The skin lesions would regress spontaneously within several days,leaving atrophic scars.He had no systemic symptoms.A physical examination revealed many papules and nodules on his trunk and extremities (Figure IA).Some papules had a necrotic center covered by black crusts.No lymphadenopathy was found.The results of peripheral blood counts,biochemical tests and urinalysis were within normal limits.The findings of chest CT and abdominal ultrasonography were unremarkable.Histological evaluation of the biopsy specimens from the abdomen and thigh showed lymphoid infiltrations in the dermis and superficial subcutaneous layer.The infiltrates in the superficial dermis were denser,composed of medium-to-large,atypical lymphoid cells with round or slightly irregular nuclei and showed pronounced epidermotropism,with scattered necrotic keratinocytes (Figure 1B).