Image Guided Evolution of Nodal Contouring Guidelines in Breast Cancer

External beam radiation therapy for breast cancer is administered to reduce locoregional recurrences, but there is increasing evidence that radiation therapy can also improve survival. The MA.201 and the European Organisation for Research and Treatment of Cancer2 trials demonstrated improved disease-free survival in patients with breast cancer receiving regional nodal irradiation, even in early stage patients with higher risk disease. However, external beam radiation therapy for breast cancer can also cause toxicity.

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