Treatment options for breast cancer can include:
- Sentinel lymph node biopsy
- External beam radiation therapy (whole breast irradiation)
- Partial breast irradiation
Decisions about Breast Cancer Surgery
There are two components of breast cancer surgery.
- The first deals with removing the breast tumor; this can be done either by removing the entire breast (mastectomy) or removing just the tumor and a small amount of surrounding normal breast tissue (breast-conserving surgery or lumpectomy). Some women with early stage breast cancer who are candidates for lumpectomy may also benefit from Intraoperative Radiation Therapy (IORT). IORT can spare some women weeks of radiation therapy.
- The second part involves removing the lymph nodes. This is necessary to find out whether the tumor has spread to the lymph nodes. Ideally, these two components (breast and lymph node surgery) are performed at the same time.
Types of Breast Cancer Surgery
A mastectomy is the surgical removal of the entire breast. There are several different types of mastectomies.
- Simple Mastectomy: A “simple mastectomy” removes the breast, nipple, and areola (the tan or brown-colored area surrounding the nipple) but it does not remove the axillary (armpit) lymph nodes.
- Modified Radical Mastectomy: A modified radical mastectomy is the removal of the entire breast, the lining over the chest muscle, and some axillary lymph nodes. When the axillary lymph nodes are removed the surgeon may place a soft, plastic drain in the wound to drain the fluid that typically collects there. The drain remains in place when the patient goes home from the hospital. Prior to leaving the hospital, the patient is taught how to empty and take care of the drains. These drains typically are removed at the first post-operative check-up.
- Skin-Sparing Mastectomy: Skin-sparing mastectomy is a technique that preserves as much skin as possible when performing a mastectomy. This is done to help the plastic, or reconstructive, surgeon provide the best cosmetic result during breast reconstruction. However, if the surgeon believes there is an area of skin that is involved with the tumor, this portion of the skin will be removed along with the tumor.
- Total Skin-Sparing Mastectomy: Total skin-sparing mastectomy is similar to the skin-sparing mastectomy, but the nipple and areola tissue are left along with the skin. Because the ducts, which can contain tumor cells, drain to the nipple, there are some restrictions/limitations for this approach.
Breast-Conserving Surgery (BCS)
Breast-conserving surgery (BCS) involves a lumpectomy (the surgical removal of a tumor and a margin of normal tissue) followed by radiation therapy to the remaining breast tissue. The goal of this treatment is to excise the tumor, while maintaining a cosmetically-acceptable breast. Sometimes this is not feasible; if the breast is very small and the tumor is large, BCS may not be an option because the surgery could create a cosmetically unacceptable breast. Additionally, patients who are pregnant may not be amenable to this technique because the radiation therapy might be harmful to the developing fetus.
Other terms that describe the removal of the tumor and a margin of normal breast include, “partial mastectomy”, “segmental mastectomy” and “quadrantectomy.” Because all of these techniques leave some breast tissue behind, they are considered breast conserving.
An important aspect of BCS is assuring the margin of normal tissue surrounding the tumor is free of cancer cells. Once the tumor is removed, the pathologist will evaluate the margins. If the margins are positive (there are cancer cells extending to the edge of the resected tissue), the patient will need to have a re-excision (more normal tissue removed from the tumor bed area) of the area to assure that all cancer cells have been removed.
INTRABEAM Intraoperative Radiation Therapy (IORT) for Breast Cancer
INTRABEAM® IORT technology now available at St. Luke's Anderson Campus spares some women with early stage breast cancer weeks of radiation therapy. Fewer than 50 sites nationwide offer this advanced radiation therapy.
Who Needs Lymph Node Surgery and Why?
There are two main goals of breast cancer surgery – the first is to remove the cancer via a mastectomy or lumpectomy. The second is to determine if any cancer cells have spread to the lymph nodes. This is recommended for patients with invasive breast cancers. Breast cancers like DCIS that are not invasive, cannot spread beyond the ducts and lobules; therefore, these patients do not need their lymph nodes evaluated. One exception to this concept is if the surgeon suspects that invasive cancer will be found when the entire tumor is removed.
There are two operations used to evaluate the lymph nodes.
When too many lymph nodes are removed, many patients develop lymphedema (swelling of the arm). To minimize the risk of lymphedema and still provide an accurate assessment of the lymph nodes, sentinel lymph node biopsy can be done.
The sentinel lymph node (SLN) is the first lymph node that receives drainage from around tumor. These nodes are typically the first to be invaded by cancer cells. The SLN is tested for cancer at the time of surgery. If there is no cancer in the SLN, it is unlikely that it has spread to other lymph nodes and, so, they are left alone. If cancer is in the SLN, the standard operation (axillary dissection) is performed. Sentinel lymph node surgery has fewer complications than axillary node dissection, but the physicians performing the procedure must have special training.
Decisions about Gene Expression Profile Testing
Technology is available to evaluate the genetic profile of individual tumors. St. Luke's uses these genetic profiles of an individual's breast cancer to help determine if chemotherapy should be given as an adjuvant therapy. There are two main tests used today—OncotypeDX® and MammaPrint®. OncotypeDX® uses 21 genes to estimate the risk of a tumor recurrence. MammaPrint®, an FDA-cleared gene expression profile test, provides information based on 70 genes about tumor biology and actively identifies a woman's risk for recurrence.
The 70-gene genomic profile can provide prognostic information in both ER-positive and ER-negative early-stage, node-negative breast cancer. However, this test requires that the tissue be appropriately preserved at the biopsy procedure or at the time of surgery. Therefore, having this test done should be discussed with the surgeon prior to surgery.
Advanced Margin Analysis
St. Luke's Hospital is one of 10 hospitals in Pennsylvania and was one of the first in the state to use MarginMarker® to color-code cancerous breast tissue immediately after surgical removal to see if the entire cancer was removed during the procedure. Using six different inks, the operating surgeon color-codes the entire excised breast tissue specimen to show exactly how the tissue was positioned, or oriented, in the body.
St. Luke's fellowship-trained surgical oncologists and most general surgeons performing breast cancer surgery at St. Luke's Hospital have been using this innovative device since 2008. It allows for a higher level of precision and greater accuracy for surgeons, radiologists and pathologists involved in the patient's care, and helps improve outcomes following breast cancer surgery.
Breast Reconstruction Surgery
This is a procedure to restore the natural appearance of the breast, and is frequently performed after partial or total mastectomy. Patients treated with a lumpectomy procedure frequently do not require reconstruction. Some patients may choose not to have immediate reconstruction of the breast, but prefer to have reconstruction at a later date. Consultation with a board-certified plastic surgeon, experienced in breast reconstruction is warranted in all of these instances.