Simple or Total: all breast tissue, skin and the nipple are surgically removed but the muscles lying under the breast and the lymph nodes are left in place.
Modified Radical: all breast tissue, skin and the nipple as well as some lymph tissue are surgically removed.
Partial: the breast lump and a portion of other breast tissue (up to one quarter of the breast) as well as lymph tissue are surgically removed.
Lumpectomy: the breast lump and surrounding tissue, as well as some lymph tissue, are surgically removed. When combined with radiation treatment, this is known as breast-conserving surgery.