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Treatment of Breast Cancer
Any lump found in the breast should be examined by a physician for the possibility of cancer. If it is found to be malignant, treatment may entail surgery, radiation, or chemotherapy. Biological treatment is also an option.
Surgery is often the first method of treatment, and a range of procedures are used depending on the type and progression of the cancer. A lumpectomy removes only the cancerous mass and a small amount of surrounding tissue; a simple mastectomy removes the entire breast; and a modified radical mastectomy removes the breast along with adjacent lymph nodes. Radical mastectomies involving removal of the breast, underlying muscle, and other tissue are rarely performed. Side effects of surgery may include changes in arm or shoulder mobility, swelling, infection, and numbness. When lymph nodes are removed, fluid may build up in the region they were taken from. Partial or complete breast removal is often followed by cosmetic or reconstructive surgery.
Radiation is usually employed—either before surgery to shrink tumours or following surgery to destroy small amounts of remaining cancerous tissue. Side effects of radiation include swelling or thickening of the breast, vomiting, fatigue, diarrhea, or skin irritations resembling sunburn. Chemotherapy, the use of chemicals to destroy cancerous cells, is commonly employed. Chemotherapeutic agents also attack normal cells to some degree, causing side effects that include hair loss, immune suppression, mouth sores, fatigue, and nausea.
Breast cancer can also be treated through biological therapy, in which chemical inhibitors are used to block the hormones that stimulate growth of cancer cells. Tamoxifen, for instance, is a common drug that blocks the ability of estrogen to stimulate tumour growth, and Megace blocks the action of progesterone by partially mimicking the hormone. Herceptin is a manufactured antibody that binds to growth factor receptors on the surface of cancer cells and thereby blocks cell proliferation.
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