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A fact sheet that defines screening and diagnostic mammograms; discusses the benefits and potential harms of screening mammography; and summarizes how findings, including breast density, are reported.

Other than skin cancer, breast cancer is the most common cancer among American women. Getting mammograms regularly can lower the risk of dying from breast cancer.

Most breast cancers are found in women who are 50 years old or older, but breast cancer also affects younger women. If you have a higher risk of getting breast cancer at a young age, talk to your doctor.