breast-sparing surgery (brest-SPAYR-ing SER-juh-ree)
An operation to
remove the cancer and some normal tissue around it, but not
the breast itself. Some lymph nodes under the arm may be
removed for biopsy. Part of the chest wall lining may also
be removed if the cancer is near it. Also called breast-conserving surgery, lumpectomy, partial mastectomy, quadrantectomy, and segmental mastectomy.