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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.
Mastectomy is usually performed as a treatment of breast cancer. In general, women with breast cancer can decide whether to be treated with a lumpectomy or a mastectomy. A lumpectomy is the removal of the cancerous breast tissue as well as a surrounding rim of healthy breast tissue. If the breast is large, the surgeon may have to make a keyhole incision (one that includes a straight incision in one direction, generally down) to allow removal of the breast tissue. 2  Nipple-sparing: The surgeon makes an incision around the nipple but leaves the areola intact.