Abstract

We report a case of Stewart-Treves syndrome. A 71-year-old Japanese woman visited us with a reddish nodule on the right upper arm. She had radical mastectomy with lymph node dissection for the right breast cancer at the age of 53. On physical examination, a solitary darkreddish nodule measured 3.0×2.5×0.8cm with subcutaneous infiltration was found on the right upper arm showing postmastectomy lymph edema. Histology of the nodule revealed numerous round cells with marked cellular atypia forming slit-like space. The diagnosis of Stewart-Treves syndrome was confirmed. The surgical excision then was performed. After the surgical resection, she was treated with electron beam irradiation and intravenous recombinant human IL-2 therpapy. The patient had no local recurrence or metastasis for 12 months after the excision.