Metastasis to the breast of a low grade endometrial stromal sarcoma 15 years posthysterectomy

Metastasis to the breast from extramammary malignancies is an extremely rare event, but its recognition is important because its treatment and outcome differ from that of primary breast carcinoma. We report on a case of low-grade endometrial stromal sarcoma with metastasis to the breast, 15 years after the initial diagnosis and treatment of the primary endometrial tumor. A 57-year-old woman presented with a mass in her right breast. The mass was biopsied and found to be a stromal sarcoma with an histology similar to that of the primary endometrial stromal sarcoma