Definitions for "Quadrantectomy"
removal of a sector of the breast (see Wide Local Excision). Radiation therapy: uses high energy x-rays to kill any cancer cells left behind (adjuvant radiotherapy) after surgery. It can treat cancer without the routine use of surgery (definitive radiotherapy).
Strictly, excision of an entire quadrant of the breast. The term is often incorrectly interchanged with segmentectomy or complete local excision.
a partial mastectomy