mastectomy mas·tec·to·my (mā-stěk'tə-mē)
n.
Surgical removal of all or part of a breast, sometimes including excision of the underlying pectoral muscles and regional lymph nodes, usually performed as a treatment for cancer. Also called mammectomy.
| mastectomy (mā-stěk'tə-mē) Pronunciation Key
Surgical removal of all or part of a breast, performed as a treatment for cancer. ◇ A radical mastectomy includes excision of the underlying pectoral muscles and regional lymph nodes. |