Margins for Breast-Conserving Surgery With Whole-Breast Irradiation in Stage I and II Invasive Breast Cancer: American Society of Clinical Oncology Endorsement of the Society of Surgical Oncology/American Society for Radiation Oncology Consensus Guideline

A clinical practice guideline for patients with stage I and II breast cancer who have undergone whole-breast irradiation. The guideline examines minimization of recurrence risks through standardized adequate margin risks. Outcomes of interest include improving cosmetic outcomes and decreasing re-excision rates.