Lumpectomy, also sometimes called breast conservation therapy, is the most common form of breast cancer surgery today. Lumpectomy involves removing only the breast lump and some normal tissue around it. Technically, a lumpectomy is a partial mastectomy, because part of the breast tissue is removed. However, the amount of tissue removed can vary greatly.
Radiation treatment is often given for about six weeks after this type of surgery. If chemotherapy is going to be used as well, the radiation may be postponed until the chemotherapy is finished.