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Segmentectomy is the excision (removal) of a portion of any organ or gland. The procedure has several variations and many names, including segmental resection, wide excision, lumpectomy, tumorectomy, quadrantectomy, and partial mastectomy.
Medical Dictionary. lumpectomy. play. noun lumpÂ·ecÂ·toÂ·my \ËlÉm-Ëpek-tÉ-mÄ\. Medical Definition of lumpectomy. plural. lumpectomies. : excision of a breast tumor with a limited amount of associated tissueâcalled also tylectomy; compare quadrantectomy.