As the name implies, breast-conserving surgeries remove the tumor, but strive to leave as much of the normal tissue of the breast as intact as possible. There are two types of breast-conserving surgeries:
• Lumpectomy (also called excisional biopsy or wide excision) is the removal of the tumor and some of the normal tissue surrounding it. In many lumpectomies, some of the lymph nodes under the arm also are removed.
• Partial or segmental mastectomy, which is the removal of the tumor, as well as some of the breast tissue around the tumor and the lining over the chest muscles below the tumor. Usually, some of the lymph nodes under the arm also are removed.
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