<prompt> Tylectomy literally meansExcision of a lumpExcision of a breastExcision of LNExcision of skin  <response>: Lumpectomy sometimes known as a tylectomy, paial mastectomy, breast segmental resection or breast wide local excision is a surgical removal of a discrete poion or lump of breast tissue, usually in the treatment of a malignant tumor or breast cancer. It is considered a ble breast conservation therapy, as the amount of tissue removed is limited compared to a full-breast mastectomy, and thus may have physical and emotional advantages over more disfiguring treatment. Ref: Internet 