: Surgery to remove the whole breast that has cancer, many of the lymph nodes under the arm, the lining over the chest muscles, and sometimes, part of the chest wall
muscles. This type of surgery is most common in pregnant women.
: Surgery to remove the cancer and some normal tissue
around it, but not the breast
itself. Part of the chest wall lining may also be removed if the cancer is near it. This type of surgery may also be called lumpectomy, partial mastectomy, segmental mastectomy, quadrantectomy, or breast-sparing surgery.
The way the radiation therapy is given depends on the type and stage
of the cancer being treated.
External radiation therapy is not given to pregnant women with early stage (stage I
or II) breast cancer because it can harm the unborn baby. For women with late stage (stage III
or IV) breast cancer, radiation therapy is not given during the first 3 months of pregnancy and is delayed until after the baby is born, if possible.
Chemotherapy is a cancer treatment that uses drugs
to stop the growth of cancer cells, either by killing the cells or by stopping the cells from dividing. When chemotherapy is taken by mouth or injected
into a vein
or muscle, the drugs enter the bloodstream and can reach cancer cells throughout the body (systemic chemotherapy). When chemotherapy is placed directly into the cerebrospinal fluid, an organ, or a body cavity
such as the abdomen, the drugs mainly affect cancer cells in those areas (regional chemotherapy). The way the chemotherapy is given depends on the type and stage of the cancer being treated.
Chemotherapy is usually not given during the first 3 months
of pregnancy. Chemotherapy given after this time does not usually harm the
unborn baby but may cause early labor and
low birth weight.