Personalizing Your Invasive Breast Cancer Treatment (STAGE I-IIIa)

Invasive breast cancer treatment is not “one size fits all”— what is best for one woman is often not right for another. You should take an active role in learning as much as possible about your breast cancer diagnosis and your available treatment options, including the success rates and side effects of each option, before making a decision about what is best for you.

As a first step, your doctor will likely recommend surgery to remove the tumor and any other cancerous tissue surrounding it. The next step is to determine the risk that your breast cancer will return. This assessment, along with your age and medical history, will be used to help you and your doctor choose the most appropriate treatment for you. It is also important to consider such personal concerns as your work/life priorities, fertility issues, and tolerance for risk. Recommended therapies may include:


Chemotherapy Benefits

Chemotherapy uses powerful drugs to kill cancer cells that remain in your body after surgery. You may receive chemotherapy in a clinic, at your doctor’s office, or at home, depending on your treatment regimen. Chemotherapy attacks undetected cancer cells, too small to be identified, in an effort to keep your cancer from returning.

Chemotherapy Risks

The side effects of chemotherapy can be serious, since the treatment targets all rapidly dividing cells in your body, including healthy cells along with cancer cells. The side effects of chemotherapy depend on the type of drugs you take and the duration of your treatment, and many will go away when treatment ends. They include:

  • Fatigue
  • Hair loss  
  • Nausea
  • Vomiting
  • Anemia
  • Diarrhea
  • Heart problems
  • Menopausal symptoms
  • Fertility issues
  • Infections
  • Memory loss
  • Neuropathy


Is chemotherapy right for you?
The Oncotype DX Breast Recurrence Score test can help you decide.

The more aggressive your cancer appears, the more likely you are to receive chemotherapy along with surgery. If you have early-stage, estrogen-receptor positive (ER+), HER2 negative breast cancer, the Oncotype DX test can help your doctor determine the chances of your individual cancer coming back (recurrence) and if you are likely to benefit from adding chemotherapy to your treatment program.

Radiation Therapy

Radiation Therapy Benefits

Radiation therapy is a highly effective and relatively safe way to destroy cancer cells that may still remain in your breast after surgery. In radiation therapy, a special kind of high-energy beam is delivered to the cancer cells either externally by a machine or internally by implanted pellets or seeds.

If you are pregnant, or unable to commit to a daily treatment schedule for several weeks, you are not a candidate for radiation therapy.

Radiation Therapy Risks

Radiation treatment is painless when administered, but can result in side effects that typically go away within several weeks of ending treatment. Some of the most common side effects are: 

  • Fatigue
  • Lowered white blood cell counts
  • Swelling and inflammation
  • Skin sensitivity and discoloration
  • Armpit and/or chest discomfort

Hormonal Therapy

Hormonal Therapy Benefits

If you have hormone receptor-positive (either ER+ or PR+) breast cancer, hormonal therapy may be recommended after surgery to lower the risk of your breast cancer from returning or spreading to a new site. Hormonal treatments are designed to block or lower the levels of the hormones in your body that stimulate the growth of your breast cancer. The therapy may involve taking a drug orally, such as tamoxifen or an aromatase inhibitor, for five years.

Hormonal Therapy Risks

Hormonal treatments can lead to side effects similar to menopause as well as: 

  • Hot flashes or flushes
  • Aches and pains in the muscles and joints
  • Nausea
  • Weakening of the bones (aromatase inhibitors)
  • Blood clots
  • Fatigue
  • Fertility issues
  • Increased risk of uterine cancer

Genomic Testing with the Oncotype DX Test -- Take Charge of your Cancer Journey

If you have been diagnosed with early-stage invasive breast cancer, the Oncotype DX Breast Recurrence Score test may be appropriate for you. Oncotype DX is a genomic breast cancer test that looks at the activity of certain genes in your tumor and provides personalized information that is not available from any other test or measure.

  • If you have early-stage invasive breast cancer, the Oncotype DX Breast Recurrence Score test is the only genomic test shown to predict the likelihood that you will benefit from adjuvant chemotherapy, while also determining the chance that your breast cancer will return. 
  • If you have DCIS, the Oncotype DX Breast DCIS Score test can help to determine the risk of your cancer returning locally – a key factor in deciding your treatment after surgery. 

Along with the information in your pathology report and other factors, your Oncotype DX test results can help you and your doctor select the best treatment path for you.