n. 〈医〉乳房肿瘤切除术

[ noun ]
surgical removal of a tumor without removing much of the surrounding tissue or lymph nodes; performed in some cases of breast cancer
<noun.act>

Lumpectomy \Lump*ec"to*my\, n. (Med.)
the removal of a cyst or tumor from the breast by surgery.
This is one method of treating breast tumors when in an early
stage, and is preferred for cosmetic reasons, when medically
feasible, to {radical mastectomy}, the removal of the entire
breast along with nearby muscles.
[PJC]