quadrantectomy

noun
quad·​rant·​ec·​to·​my | \ ˌkwäd-rən-ˈtek-tə-mē How to pronounce quadrantectomy (audio) \
plural quadrantectomies

Medical Definition of quadrantectomy

: a partial mastectomy involving excision of a tumor along with the involved quadrant of the breast including the skin and underlying fascia — compare lumpectomy