Breast sarcoma.

Primary sarcoma of the breast is a rare problem and accounts for less than 5% of all soft-tissue sarcomas and less than 1% of all breast malignancies. As experience with breast sarcoma has increased, the perceived differences with other soft-tissue sarcomas has decreased. Outcome is predicated upon histologic type, degree of differentiation, and tumor size. Recurrences are primarily local as an early event and distant to the lung somewhat later in the course of the disease.