Adjuvant Radiation Therapy for Invasive Breast Cancer

This is a clinical practice guideline for adult patients with invasive breast cancer who have had breast-conserving surgery or a mastectomy. The guideline examines what is the optimal radiotherapy treatment after surgery for patients with T1, T2, T3, T4 invasive breast cancer according to lymph node status. Other outcomes of interest include: the manner in which a positive margin should be handled for patients with breast conserving surgery, as well as what the optimal radiotherapy treatment after surgery should be for patients with invasive breast cancer who have had neoadjuvant chemotherapy.