Breast cancer is the most common type of cancer in American women, according to the American Cancer Society. This year, 231,840 women and 2,350 men will learn they have breast cancer. Another 60,290 women will learn they have noninvasive (also called in situ) breast cancer. Breast cancer can often be cured. About 83 percent of all patients with breast cancer live at least 10 years after their diagnosis.

Radiation therapy following mastectomy reduces the risk of the tumor recurring and improves the probability of survival. Radiation therapy following removal of the cancer with a smaller margin (e.g., lumpectomy) is an important component of breast conservation therapy and also improves the probability of long-term survival.

However, as with any cancer treatment, these important benefits do come with some risks. Side effects of radiation therapy for breast cancer can be bothersome, but they also are treatable and temporary, typically going away shortly after radiation treatment ends. The process of breast radiation usually involves daily treatments for a few weeks, all under the care and attention of a radiation oncology team that includes doctors, therapists and nurses trained to help our patients not only with their cancer, but also with the side effects that may come from treating it.

Multiple factors, such as the stage and location of the cancer, can influence the severity of each individual’s reaction to treatment. Skin reactions during radiation therapy are common, but they usually are not as severe as those shown in pictures currently circulating via some news and media outlets. The vast majority of patients have much milder skin reactions, and when an adverse reaction does occur, it is almost always transient.

Radiation oncology teams are trained to help resolve a patient’s discomfort and anxiety associated with negative reactions to treatment. In the long term, the majority of patients who receive radiation therapy for breast cancer are pleased with their overall result.

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If you find out you have breast cancer, you should discuss your treatment options with your physician. Breast cancer treatment will vary depending on the stage and location of the cancer.

Breast cancer treatments options include:

Surgery is the main treatment for breast cancer. This is often followed by radiation therapy to decrease the risk of cancer returning in the breast, chest wall and/or lymph nodes.

Lumpectomy, or partial mastectomy, is the surgical removal of the cancerous tissue along with a small rim of surrounding healthy breast tissue. This type of breast conserving surgery is often followed by radiation therapy.

Mastectomy is the surgical removal of the entire breast. Sometimes, breast reconstruction can be performed after mastectomy. While less common, radiation is sometimes recommended after mastectomy as well.

A select number of lymph nodes near the breast may be removed during surgery to determine if they contain tumor cells. If one or more of the lymph nodes contain tumor cells, the removal of additional lymph nodes may be recommended. As examination of the lymph nodes is typically performed with lumpectomy or mastectomy.

Both mastectomy and breast conserving therapy (surgery and radiation) can be equally effective approaches in curing breast cancer. Ask your surgeon and radiation oncologist about the risks and benefits of both options.

Radiation Therapy after surgery can decrease the chance of cancer returning in the breast and improve survival. Radiation therapy involves delivering focused radiation to the breast or chest wall, and sometimes the lymph nodes, to treat cancer cells not detected or removed by the surgery. Radiation therapy kills cancer cells by destroying their ability to multiply.

Medical Therapy is often recommended to improve cure rates or prevent a new breast cancer from developing. A medical oncologist will evaluate you and determine what medications may be most helpful in accomplishing those goals.

Chemotherapy has the ability to destroy cancer cells. Often, two or three different types of drugs may be combined to get the best outcome. While the dose and schedule for treatment varies, chemotherapy is usually delivered every two to three weeks over a few month period.

Hormonal therapy can block the effects of the female hormone estrogen in the body. Estrogen has been shown in some cases to cause your tumor to grow. Usually taken as a daily pill, hormonal therapy may be started during or after radiation therapy is completed.

Immunotherapy works by either stimulating your immune system to attack cancer cells r providing your immune system with what it needs, such as antibodies, to fight cancer.

Ask your medical oncologist what medications may be best for you.

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Whole Breast External Beam Radiation Therapy After Lumpectomy

After lumpectomy, the usual course of radiation treats the whole breast and, if needed, nearby lymph node areas. The radiation beam comes from a linear accelerator, or linac. The radiation beam is a specialized X-ray, and it is painless. Each is brief. Treatment is delivered every day, five days a week, Monday through Friday. The full course of treatment is usually delivered over three to seven weeks, depending on findings during surgery.

Before beginning treatment, you will be scheduled for a planning session to map out the area of treatment. This procedure is called a simulation. Simulation involves having X-rays and/or a CT scan. Tiny tattoo-like marks made on your skin help the radiation therapist precisely position you for daily treatment.

Typically, radiation therapy is done with high energy X-rays, or photons. If needed, electrons may be used to treat the area where the lump was removed with a less penetrating, more focused beam.

Recent clinical trials suggest that whole breast radiation may be shortened by treating the tumor with higher daily doses over less time.

Additional research suggests women aged 70 or older with hormone receptor positive early-stage breast cancer benefit from radiation in terms of lowering their risk of getting breast cancer again in the treated breast but has not been shown to affect long-term survival. Discuss with your radiation oncologist whether treatment with radiation is necessary.

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Accelerated Partial Breast Irradiation After Lumpectomy (APBI)

Ongoing research suggests that it may be safe to give radiation treatment to only the part of the breast that had the tumor, over a shorter period of time.

There are two different approaches to APBI:

  1. Breast brachytherapy involves placing flexible plastic tubes called catheters, or a balloon, directly into the cavity where the lump was taken out. A small, radioactive seed is guided into the catheters or balloon and is left in place for several minutes based on the treatment plan designed by the radiation oncologist. The procedure is repeated twice daily for a period of five days, then the catheters or balloon are removed and the treatment is finished.
  2. External beam radiation with 3-D CRT is delivered in a similar way to standard whole breast radiation using a linear accelerator. However, it is more focused on the area around the surgery. Treatment occurs twice daily over a one week period.

The long-term results of these techniques appear promising but are still being studied. Talk with your radiation oncologist for more information.

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Chest Wall Radiation after Mastectomy

After a mastectomy, your doctor may suggest radiation therapy for the chest wall and nearby lymph node areas. Whether or not radiation therapy should be used after removal of your breast depends on several factors such as the number of lymph nodes involved, tumor size and whether or not cancer cells were found near the edge of the surgical site. Women planning to undergo reconstruction should discuss the impact of post-mastectomy radiation with their surgeon and radiation oncologist.

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Side effects are usually temporary and usually go away shortly after treatment ends.Ask your doctor what you can expect from your specific treatment.

Tell us if you experience any discomfort so we can help you feel better.

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  • Get plenty of rest during treatment, and don't be afraid to ask for help.
  • Follow your doctor's advice. Ask if you are unsure about anything.
  • There are no stupid questions.
  • Tell your doctor about any medications, vitamins or supplements you are taking to make sure they are safe to use during radiation therapy.
  • Eat a balanced diet and drink plenty of fluids. If food tastes funny or if you're having trouble eating, tell your doctor, nurse or dietitian.
  • Treat the skin exposed to radiation with special care. Stay out of the sun, avoid hot or cold packs, only use lotions and ointments after checking with your doctor or nurse and clean the area with warm water and mild soap.

Coping with the stress of a cancer diagnosis can be tough. It may help to seek out help from support groups and friends.

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Breast Cancer.org


Imaginis: The Breast Cancer Resource

Living Beyond Breast Cancer

1-888-753-LBBC (5222)

National Breast Cancer Foundation, Inc.




Sister Network


Also see Helpful Links

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Download some helpful brochures from www.rtanswers.org:

Breast Cancer Brochure
Questions to Ask

*Content provided by the American Society for Radiation Oncology, www.rtanswers.org, and the American Cancer Society.

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