Final answer:
A lumpectomy is a breast-conserving surgery that involves removing the breast cancer tumor and some surrounding normal breast tissue, used in conjunction with radiation therapy.
Step-by-step explanation:
A lumpectomy is the surgical procedure that involves removing the breast cancer tumor and some surrounding normal breast tissue. It is a breast-conserving surgery that aims to remove the tumor while preserving the rest of the breast. This procedure is often combined with radiation therapy to ensure the complete removal of cancer cells.