Radiation therapy involves delivering precise amounts of high-energy radiation to kill cancer cells. The radiation stops the reproduction of cancer cells while minimizing damage to healthy tissues. Radiation therapy has been shown to improve survival in women with breast cancer.
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The type of breast cancer radiation that most people are familiar with is called external beam radiation. It's also the type most commonly used in cases of breast cancer. External beam radiation works by focusing a beam of radiation from a machine to its target, the area of the body affected by cancer.
The other type of breast cancer radiation is called brachytherapy. This type delivers radiation to the cancer internally using an implant. In the case of breast cancer, radioactive seeds or pellets -- as small as grains of rice -- are placed inside the breast near the cancer. Brachytherapy can be used alone or with external beam radiation. Tumor size, location, and other factors will determine if someone is a candidate for this type of radiation.
External Beam Radiation Therapy Side Effects
Radiation therapy is painless. However, some women experience side effects, which can include:
Redness, discomfort, and dryness of the skin in the treated area. Your doctor will recommend a specific treatment if this happens. The redness can take as long as a year to fade.
Fatigue, usually starting two to three weeks after treatment begins. The fatigue increases during the duration of treatment and goes away about a month after treatment ends. Fatigue should not disable you. Most women cope by taking a nap or by going to bed earlier.
Reduced blood counts. Your blood will be checked regularly, especially if you are also receiving chemotherapy.