From Longman Dictionary of Contemporary Englishlumpectomylump‧ec‧to‧my /lʌmpˈektəmi/ noun (plural lumpectomies) [countable] MHan operation in which a tumour is removed from someone’s body, especially from a woman’s breast
Examples from the Corpus
lumpectomy• This woman was 37 years old, and she too had had a lumpectomy and radiotherapy four years earlier.• But along the Interstate 91 corridor of New Hampshire and Vermont, fewer than 20 percent of such patients have lumpectomies. 