Pathologic Characteristics of Breast Cancer that Predict for Local Recurrence After Lumpectomy Alone.

Breast conservation surgery (BCS) plus irradiation has been shown to be equivalent to mastectomy in controlling ipsilateral breast cancer recurrence. The purpose of this study is to evaluate the factors that determine the rate of local recurrence in a group of patients treated with partial mastectomy without postoperative radiation, adjuvant hormonal therapy, or chemotherapy. We also assess the role of standard pathologic features, specifically lymphovascular invasion (LVI) in identifying high- and low-risk subsets of patients.