Is There a Role for Selective Axillary Dissection in Breast Cancer?

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Abstract
Surgery is the most effective therapeutic intervention available for the treatment of breast cancer. It has been responsible for obtaining local control and long‐term disease‐free intervals in more patients over the past century than any other treatment modality. Trends toward earlier stage at diagnosis are likely to increase the importance of surgery and to secure its central role in the treatment of this disease. Unfortunately, during the 1990s the value of excellent local control of breast cancer has been minimized as the disease has come to be considered systemic from inception and as the results of adjuvant‐therapy trials in patients with early‐stage breast cancer have revealed survival advantages in patients receiving systemic therapy. Only rarely is it acknowledged that surgery alone achieves long‐term disease‐free states in 70% to 80% of all patients. At the core of this paradigmatic controversy is management of the axilla. The status of the axilla remains the most powerful predictor of outcome in patients with invasive carcinoma of the breast, and it is likely that a small but identifiable subset of patients obtains a survival benefit from the removal of disease‐containing nodes. It is believed that no benefit is derived from the removal of negative nodes, and indeed there are even patients in whom complete elimination of the exploration of the axilla may be considered—all of which underscores the need to investigate the axilla selectively. Lymphatic mapping and sentinel lymph node (SLN) biopsy represents the most exciting development to date toward this end. The challenge today, as we move closer to a selective approach to the axilla, is to ensure that patients with positive nodes have those nodes identified and removed and patients with negative nodes experience minimal disturbance of their axilla.

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