Key Points
                    - There are different types of treatment for patients with breast cancer.    - Five types of standard treatment are used:         - Surgery      - Radiation therapy      - Chemotherapy      - Hormone therapy      - Targeted therapy        - New types of treatment are being tested in clinical trials.          - High-dose chemotherapy with stem cell transplant        - Treatment for breast cancer may cause side effects.    - Patients may want to think about taking part in a clinical trial.    - Patients can enter clinical trials before, during, or after starting their cancer treatment.    - Follow-up tests may be needed.
                
                
                    There are different types of treatment for patients with breast cancer.
                    Different types of treatment are available for patients with breast cancer. Some treatments are standard (the currently used treatment), and some are being tested in clinical trials. A treatment clinical trial is a research study meant to help improve current treatments or obtain information on new treatments for patients with cancer. When clinical trials show that a new treatment is better than the standard treatment, the new treatment may become the standard treatment. Patients may want to think about taking part in a clinical trial. Some clinical trials are open only to patients who have not started treatment.
                
                
                    Five types of standard treatment are used:
                    Surgery     Most patients with breast cancer have surgery to remove the cancer.     Sentinel lymph node biopsy is the removal of the sentinel lymph node during surgery. The sentinel lymph node is the first lymph node to receive lymphatic drainage from a tumor. It is the first lymph node where the cancer is likely to spread. A radioactive substance and/or blue dye is injected near the tumor. The substance or dye flows through the lymph ducts to the lymph nodes. The first lymph node to receive the substance or dye is removed. A pathologist views the tissue under a microscope to look for cancer cells. After the sentinel lymph node biopsy, the surgeon removes the tumor using breast-conserving surgery or mastectomy. If cancer cells were not found in the sentinel lymph node, it may not be necessary to remove more lymph nodes. If cancer cells were found, more lymph nodes will be removed through a separate incision. This is called a lymph node dissection.    Types of surgery include the following:            - Breast-conserving surgery is an operation 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.     -  Total mastectomy: Surgery to remove the whole breast that has cancer. This procedure is also called a simple mastectomy. Some of the lymph nodes under the arm may be removed and checked for cancer. This may be done at the same time as the breast surgery or after. This is done through a separate incision.      -  Modified radical mastectomy: 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.             Chemotherapy may be given before surgery to remove the tumor. When given before surgery, chemotherapy will shrink the tumor and reduce the amount of tissue that needs to be removed during surgery. Treatment given before surgery is called preoperative therapy or neoadjuvant therapy.    Even if the doctor removes all the cancer that can be seen at the time of the surgery, some patients may be given radiation therapy, chemotherapy, or hormone therapy after surgery, to kill any cancer cells that are left. Treatment given after the surgery, to lower the risk that the cancer will come back, is called postoperative therapy or adjuvant therapy.     If a patient is going to have a mastectomy, breast reconstruction (surgery to rebuild a breasts shape after a mastectomy) may be considered. Breast reconstruction may be done at the time of the mastectomy or at some time after. The reconstructed breast may be made with the patients own (nonbreast) tissue or by using implants filled with saline or silicone gel. Before the decision to get an implant is made, patients can call the Food and Drug Administration's (FDA) Center for Devices and Radiologic Health at 1-888-INFO-FDA (1-888-463-6332) or visit the FDA website for more information on breast implants.        Radiation therapy     Radiation therapy is a cancer treatment that uses high-energy x-rays or other types of radiation to kill cancer cells or keep them from growing. There are two types of radiation therapy:            -  External radiation therapy uses a machine outside the body to send radiation toward the cancer.     -  Internal radiation therapy uses a radioactive substance sealed in needles, seeds, wires, or catheters that are placed directly into or near the cancer.           The way the radiation therapy is given depends on the type and stage of the cancer being treated. External radiation therapy is used to treat breast cancer. Internal radiation therapy with strontium-89 (a radionuclide) is used to relieve bone pain caused by breast cancer that has spread to the bones. Strontium-89 is injected into a vein and travels to the surface of the bones. Radiation is released and kills cancer cells in the bones.       Chemotherapy     Chemotherapy is a cancer treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping them 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. Systemic chemotherapy is used in the treatment of breast cancer.    See Drugs Approved for Breast Cancer for more information.       Hormone therapy      Hormone therapy is a cancer treatment that removes hormones or blocks their action and stops cancer cells from growing. Hormones are substances made by glands in the body and circulated in the bloodstream. Some hormones can cause certain cancers to grow. If tests show that the cancer cells have places where hormones can attach (receptors), drugs, surgery, or radiation therapy is used to reduce the production of hormones or block them from working. The hormone estrogen, which makes some breast cancers grow, is made mainly by the ovaries. Treatment to stop the ovaries from making estrogen is called ovarian ablation.     Hormone therapy with tamoxifen is often given to patients with early localized breast cancer that can be removed by surgery and those with metastatic breast cancer (cancer that has spread to other parts of the body). Hormone therapy with tamoxifen or estrogens can act on cells all over the body and may increase the chance of developing endometrial cancer. Women taking tamoxifen should have a pelvic exam every year to look for any signs of cancer. Any vaginal bleeding, other than menstrual bleeding, should be reported to a doctor as soon as possible.    Hormone therapy with a luteinizing hormone-releasing hormone (LHRH) agonist is given to some premenopausal women who have just been diagnosed with hormone receptor positive breast cancer. LHRH agonists decrease the body's estrogen and progesterone.     Hormone therapy with an aromatase inhibitor is given to some postmenopausal women who have hormone receptor positive breast cancer. Aromatase inhibitors decrease the body's estrogen by blocking an enzyme called aromatase from turning androgen into estrogen. Anastrozole, letrozole, and exemestane are types of aromatase inhibitors.    For the treatment of early localized breast cancer that can be removed by surgery, certain aromatase inhibitors may be used as adjuvant therapy instead of tamoxifen or after 2 to 3 years of tamoxifen use. For the treatment of metastatic breast cancer, aromatase inhibitors are being tested in clinical trials to compare them to hormone therapy with tamoxifen.    Other types of hormone therapy include megestrol acetate or anti-estrogen therapy such as fulvestrant.    See Drugs Approved for Breast Cancer for more information.       Targeted therapy     Targeted therapy is a type of treatment that uses drugs or other substances to identify and attack specific cancer cells without harming normal cells. Monoclonal antibodies, tyrosine kinase inhibitors, cyclin-dependent kinase inhibitors, mammalian target of rapamycin (mTOR) inhibitors, and PARP inhibitors are types of targeted therapies used in the treatment of breast cancer.    Monoclonal antibody therapy is a cancer treatment that uses antibodies made in the laboratory, from a single type of immune system cell. These antibodies can identify substances on cancer cells or normal substances that may help cancer cells grow. The antibodies attach to the substances and kill the cancer cells, block their growth, or keep them from spreading. Monoclonal antibodies are given by infusion. They may be used alone or to carry drugs, toxins, or radioactive material directly to cancer cells. Monoclonal antibodies may be used in combination with chemotherapy as adjuvant therapy.    Types of monoclonal antibody therapy include the following:            -  Trastuzumab is a monoclonal antibody that blocks the effects of the growth factor protein HER2, which sends growth signals to breast cancer cells. It may be used with other therapies to treat HER2 positive breast cancer.      -  Pertuzumab is a monoclonal antibody that may be combined with trastuzumab and chemotherapy to treat breast cancer. It may be used to treat certain patients with HER2 positive breast cancer that has metastasized (spread to other parts of the body). It may also be used as neoadjuvant therapy in certain patients with early stage HER2 positive breast cancer.     -  Ado-trastuzumab emtansine is a monoclonal antibody linked to an anticancer drug. This is called an antibody-drug conjugate. It is used to treat HER2 positive breast cancer that has spread to other parts of the body or recurred (come back).            Tyrosine kinase inhibitors are targeted therapy drugs that block signals needed for tumors to grow. Tyrosine kinase inhibitors may be used with other anticancer drugs as adjuvant therapy. Tyrosine kinase inhibitors include the following:            -  Lapatinib is a tyrosine kinase inhibitor that blocks the effects of the HER2 protein and other proteins inside tumor cells. It may be used with other drugs to treat patients with HER2 positive breast cancer that has progressed after treatment with trastuzumab.           Cyclin-dependent kinase inhibitors are targeted therapy drugs that block proteins called cyclin-dependent kinases, which cause the growth of cancer cells. Cyclin-dependent kinase inhibitors include the following:            -  Palbociclib is a cyclin-dependent kinase inhibitor used with the drug letrozole to treat breast cancer that is estrogen receptor positive and HER2 negative and has spread to other parts of the body. It is used in postmenopausal women whose cancer has not been treated with hormone therapy. Palbociclib may also be used with fulvestrant in women whose disease has gotten worse after treatment with hormone therapy.      -  Ribociclib is a cyclin-dependent kinase inhibitor used with letrozole to treat breast cancer that is hormone receptor positive and HER2 negative and has come back or spread to other parts of the body. It is used in postmenopausal women whose cancer has not been treated with hormone therapy.            Mammalian target of rapamycin (mTOR) inhibitors block a protein called mTOR, which may keep cancer cells from growing and prevent the growth of new blood vessels that tumors need to grow. mTOR inhibitors include the following:            -  Everolimus is an mTOR inhibitor used in postmenopausal women with advanced hormone receptor positive breast cancer that is also HER2 negative and has not gotten better with other treatment.            PARP inhibitors are a type of targeted therapy that block DNA repair and may cause cancer cells to die. PARP inhibitor therapy is being studied for the treatment of patients with triple negative breast cancer or tumors with  BRCA1  or  BRCA2  mutations.    See Drugs Approved for Breast Cancer for more information.
                
                
                    New types of treatment are being tested in clinical trials.
                    This summary section describes treatments that are being studied in clinical trials. It may not mention every new treatment being studied. Information about clinical trials is available from the NCI website.     High-dose chemotherapy with stem cell transplant     High-dose chemotherapy with stem cell transplant is a way of giving high doses of chemotherapy and replacing blood -forming cells destroyed by the cancer treatment. Stem cells (immature blood cells) are removed from the blood or bone marrow of the patient or a donor and are frozen and stored. After the chemotherapy is completed, the stored stem cells are thawed and given back to the patient through an infusion. These reinfused stem cells grow into (and restore) the bodys blood cells.    Studies have shown that high-dose chemotherapy followed by stem cell transplant does not work better than standard chemotherapy in the treatment of breast cancer. Doctors have decided that, for now, high-dose chemotherapy should be tested only in clinical trials. Before taking part in such a trial, women should talk with their doctors about the serious side effects, including death, that may be caused by high-dose chemotherapy.
                
                
                    Treatment for breast cancer may cause side effects.
                    For information about side effects that begin during treatment for cancer, see our Side Effects page.   Some treatments for breast cancer may cause side effects that continue or appear months or years after treatment has ended. These are called late effects.   Late effects of radiation therapy are not common, but may include:         -  Inflammation of the lung after radiation therapy to the breast, especially when chemotherapy is given at the same time.     - Arm lymphedema, especially when radiation therapy is given after lymph node dissection.     - In women younger than 45 years who receive radiation therapy to the chest wall after mastectomy, there may be a higher risk of developing breast cancer in the other breast.        Late effects of chemotherapy depend on the drugs used, but may include:         -  Heart failure.    -  Blood clots.    -  Premature menopause.    -  Second cancer, such as leukemia.        Late effects of targeted therapy with trastuzumab, lapatinib, or pertuzumab may include:         - Heart problems such as heart failure.
                
                
                    Patients may want to think about taking part in a clinical trial.
                    For some patients, taking part in a clinical trial may be the best treatment choice. Clinical trials are part of the cancer research process. Clinical trials are done to find out if new cancer treatments are safe and effective or better than the standard treatment.   Many of today's standard treatments for cancer are based on earlier clinical trials. Patients who take part in a clinical trial may receive the standard treatment or be among the first to receive a new treatment.   Patients who take part in clinical trials also help improve the way cancer will be treated in the future. Even when clinical trials do not lead to effective new treatments, they often answer important questions and help move research forward.
                
                
                    Patients can enter clinical trials before, during, or after starting their cancer treatment.
                    Some clinical trials only include patients who have not yet received treatment. Other trials test treatments for patients whose cancer has not gotten better. There are also clinical trials that test new ways to stop cancer from recurring (coming back) or reduce the side effects of cancer treatment.   Clinical trials are taking place in many parts of the country. See the Treatment Options section that follows for links to current treatment clinical trials. These have been retrieved from NCI's listing of clinical trials.
                
                
                    Follow-up tests may be needed.
                    Some of the tests that were done to diagnose the cancer or to find out the stage of the cancer may be repeated. Some tests will be repeated in order to see how well the treatment is working. Decisions about whether to continue, change, or stop treatment may be based on the results of these tests.   Some of the tests will continue to be done from time to time after treatment has ended. The results of these tests can show if your condition has changed or if the cancer has recurred (come back). These tests are sometimes called follow-up tests or check-ups.
                
		        
		            Treatment Options for Breast Cancer
		            
		                
		                    Early, Localized, or Operable Breast Cancer
		                    Treatment of early, localized, or operable breast cancer may include the following:       Surgery             -  Breast-conserving surgery and sentinel lymph node biopsy. If cancer is found in the lymph nodes, a lymph node dissection may be done.     -  Modified radical mastectomy. Breast reconstruction surgery may also be done.                Postoperative radiation therapy     For women who had breast-conserving surgery, radiation therapy is given to the whole breast to lessen the chance the cancer will come back. Radiation therapy may also be given to lymph nodes in the area.    For women who had a modified radical mastectomy, radiation therapy may be given to lessen the chance the cancer will come back if any of the following are true:            - Cancer was found in 4 or more lymph nodes.     - Cancer had spread to tissue around the lymph nodes.     - The tumor was large.     - There is tumor close to or remaining in the tissue near the edges of where the tumor was removed.                Postoperative systemic therapy      Systemic therapy is the use of drugs that can enter the bloodstream and reach cancer cells throughout the body. Postoperative systemic therapy is given to lessen the chance the cancer will come back after surgery to remove the tumor.    Postoperative systemic therapy is given depending on whether:            - The tumor is hormone receptor negative or positive.     - The tumor is HER2/neu negative or positive.     - The tumor is hormone receptor negative and HER2/neu negative (triple negative).     - The size of the tumor.           In premenopausal women with hormone receptor positive tumors, no more treatment may be needed or postoperative therapy may include:            -  Tamoxifen therapy with or without chemotherapy.     - Tamoxifen therapy and treatment to stop or lessen how much estrogen is made by the ovaries. Drug therapy, surgery to remove the ovaries, or radiation therapy to the ovaries may be used.     -  Aromatase inhibitor therapy and treatment to stop or lessen how much estrogen is made by the ovaries. Drug therapy, surgery to remove the ovaries, or radiation therapy to the ovaries may be used.           In postmenopausal women with hormone receptor positive tumors, no more treatment may be needed or postoperative therapy may include:            - Aromatase inhibitor therapy with or without chemotherapy.     - Tamoxifen followed by aromatase inhibitor therapy, with or without chemotherapy.           In women with hormone receptor negative tumors, no more treatment may be needed or postoperative therapy may include:            - Chemotherapy.           In women with HER2/neu negative tumors, postoperative therapy may include:            - Chemotherapy.           In women with small, HER2/neu positive tumors, and no cancer in the lymph nodes, no more treatment may be needed. If there is cancer in the lymph nodes, or the tumor is large, postoperative therapy may include:            - Chemotherapy and targeted therapy (trastuzumab).     -  Hormone therapy, such as tamoxifen or aromatase inhibitor therapy, for tumors that are also hormone receptor positive.           In women with small, hormone receptor negative and HER2/neu negative tumors (triple negative) and no cancer in the lymph nodes, no more treatment may be needed. If there is cancer in the lymph nodes or the tumor is large, postoperative therapy may include:            - Chemotherapy.     - Radiation therapy.     - A clinical trial of a new chemotherapy regimen.     - A clinical trial of PARP inhibitor therapy.                Preoperative systemic therapy     Systemic therapy is the use of drugs that can enter the bloodstream and reach cancer cells throughout the body. Preoperative systemic therapy is given to shrink the tumor before surgery.    In postmenopausal women with hormone receptor positive tumors, preoperative therapy may include:            - Chemotherapy.     - Hormone therapy, such as tamoxifen or aromatase inhibitor therapy, for women who cannot have chemotherapy.           In premenopausal women with hormone receptor positive tumors, preoperative therapy may include:            - A clinical trial of hormone therapy, such as tamoxifen or aromatase inhibitor therapy.           In women with HER2/neu positive tumors, preoperative therapy may include:            - Chemotherapy and targeted therapy (trastuzumab).     - Targeted therapy (pertuzumab).           In women with HER2/neu negative tumors or triple negative tumors, preoperative therapy may include:            - Chemotherapy.            Check the list of NCI-supported cancer clinical trials that are now accepting patients with stage I breast cancer, stage II breast cancer, stage IIIA breast cancer and stage IIIC breast cancer. For more specific results, refine the search by using other search features, such as the location of the trial, the type of treatment, or the name of the drug. Talk with your doctor about clinical trials that may be right for you. General information about clinical trials is available from the NCI website.
		                
		                
		                    Locally Advanced or Inflammatory Breast Cancer
		                    Treatment of locally advanced or inflammatory breast cancer is a combination of therapies that may include the following:         -  Surgery (breast-conserving surgery or total mastectomy) with lymph node dissection.    -  Chemotherapy before and/or after surgery.    -  Radiation therapy after surgery.    -  Hormone therapy after surgery for tumors that are estrogen receptor positive or estrogen receptor unknown.    -  Clinical trials testing new anticancer drugs, new drug combinations, and new ways of giving treatment.         Check the list of NCI-supported cancer clinical trials that are now accepting patients with stage IIIB breast cancer, stage IIIC breast cancer, stage IV breast cancer and inflammatory breast cancer. For more specific results, refine the search by using other search features, such as the location of the trial, the type of treatment, or the name of the drug. Talk with your doctor about clinical trials that may be right for you. General information about clinical trials is available from the NCI website.
		                
		                
		                    Locoregional Recurrent Breast Cancer
		                    Treatment of locoregional recurrent breast cancer (cancer that has come back after treatment in the breast, in the chest wall, or in nearby lymph nodes), may include the following:         -  Chemotherapy.    -  Hormone therapy for tumors that are hormone receptor positive.    -  Radiation therapy.    -  Surgery.    -  Targeted therapy (trastuzumab).     - A clinical trial of a new treatment.        See the Metastatic Breast Cancer section for information about treatment options for breast cancer that has spread to parts of the body outside the breast, chest wall, or nearby lymph nodes.   Check the list of NCI-supported cancer clinical trials that are now accepting patients with recurrent breast cancer. For more specific results, refine the search by using other search features, such as the location of the trial, the type of treatment, or the name of the drug. Talk with your doctor about clinical trials that may be right for you. General information about clinical trials is available from the NCI website.
		                
		                
		                    Metastatic Breast Cancer
		                    Treatment options for metastatic breast cancer (cancer that has spread to distant parts of the body) may include the following:       Hormone therapy     In postmenopausal women who have just been diagnosed with metastatic breast cancer that is hormone receptor positive or if the hormone receptor status is not known, treatment may include:            -  Tamoxifen therapy.     -  Aromatase inhibitor therapy (anastrozole, letrozole, or exemestane). Sometimes cyclin-dependent kinase inhibitor therapy (palbociclib) is also given.           In premenopausal women who have just been diagnosed with metastatic breast cancer that is hormone receptor positive, treatment may include:             - Tamoxifen, an LHRH agonist, or both.           In women whose tumors are hormone receptor positive or hormone receptor unknown, with spread to the bone or soft tissue only, and who have been treated with tamoxifen, treatment may include:             - Aromatase inhibitor therapy.     - Other hormone therapy such as megestrol acetate, estrogen or androgen therapy, or anti-estrogen therapy such as fulvestrant.                Targeted therapy     In women with metastatic breast cancer that is hormone receptor positive and has not responded to other treatments, options may include targeted therapy such as:            -  Trastuzumab, lapatinib, pertuzumab, or mTOR inhibitors.     -  Antibody-drug conjugate therapy with ado-trastuzumab emtansine.     - Cyclin-dependent kinase inhibitor therapy (palbociclib) combined with letrozole.           In women with metastatic breast cancer that is HER2/neu positive, treatment may include:             - Targeted therapy such as trastuzumab, pertuzumab, ado-trastuzumab emtansine, or lapatinib.                Chemotherapy     In women with metastatic breast cancer that is hormone receptor negative, has not responded to hormone therapy, has spread to other organs or has caused symptoms, treatment may include:            -  Chemotherapy with one or more drugs.                Surgery             -  Total mastectomy for women with open or painful breast lesions. Radiation therapy may be given after surgery.     - Surgery to remove cancer that has spread to the brain or spine. Radiation therapy may be given after surgery.     - Surgery to remove cancer that has spread to the lung.     - Surgery to repair or help support weak or broken bones. Radiation therapy may be given after surgery.     - Surgery to remove fluid that has collected around the lungs or heart.                Radiation therapy             - Radiation therapy to the bones, brain, spinal cord, breast, or chest wall to relieve symptoms and improve quality of life.     -  Strontium-89 (a radionuclide) to relieve pain from cancer that has spread to bones throughout the body.                Other treatment options     Other treatment options for metastatic breast cancer include:            - Drug therapy with bisphosphonates or denosumab to reduce bone disease and pain when cancer has spread to the bone. (See the PDQ summary on Cancer Pain for more information about bisphosphonates.)     - A clinical trial of high-dose chemotherapy with stem cell transplant.     - Clinical trials testing new anticancer drugs, new drug combinations, and new ways of giving treatment.            Check the list of NCI-supported cancer clinical trials that are now accepting patients with metastatic cancer. For more specific results, refine the search by using other search features, such as the location of the trial, the type of treatment, or the name of the drug. Talk with your doctor about clinical trials that may be right for you. General information about clinical trials is available from the NCI website.