Breast-conserving surgery (also called a lumpectomy, quadrantectomy, partial mastectomy, or segmental mastectomy) is a surgery in which only the part of the breast containing the cancer is removed. The goal is to remove the cancer as well as some surrounding normal tissue. How much breast is removed depends on where and how big the tumor is, as well as other factors.
Breast -conserving surgery (BCS) is a good option for many women with early-stage cancer. The main advantage is that a woman holds her breasts longer. However, in most cases he also needs radiation therapy given by a radiation oncologist (a doctor who specializes in radiation). Women who have had their entire breast removed for early-stage cancer (mastectomy) are less likely to need radiation therapy, but may be referred to an oncologist for evaluation because each patient’s cancer is unique.
REFRENCE : www.cancer.org