Breast Cancer (cont.)
IN THIS ARTICLE
The exact cause of breast cancer is not known. A woman's age and health history play a part. The chances that you will get breast cancer increase as you age. In the United States, 1 woman out of 8 will be diagnosed with breast cancer at some point in her life.2
To learn more, see What Increases Your Risk.
The first sign of breast cancer is often a painless lump. But early breast cancer is often found on a mammogram before a lump can be felt.
Other symptoms of breast cancer may not appear until the cancer is more advanced. These include:
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