Wide Local Excision Versus Oncoplastic Breast Surgery: Differences in Surgical Outcome for an Assumed Margin (0, 1, or 2Â mm) Distance

OBS is not inferior to standard WLE at providing a safe and clear oncologic margin regardless of margin distance (up to 2 mm) despite larger tumor size. The additional benefit of improved cosmesis, particularly in patients with larger tumor-to-breast ratio, offers a suitable and safe alternative, thus increasing patient choice and reducing the incidence of reexcision and completion mastectomy.