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Lumpectomy is a surgical procedure performed on a solid breast mass to determine if it is malignant. The suspicious lump and some surrounding tissue is excised and analyzed.

Review Date 12/4/2015

Updated by: Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital, Boston, MA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.