Mammography is a low-dose x-ray of the breasts to find changes that may occur. It is the most common imaging technique. Mammography can detect cancer or other problems before a lump becomes large enough to be felt, as well as assist in the diagnosis of other breast problems. However, a biopsy is required to confirm the presence of cancer.
Because when to begin and how often to have mammograms is controversial, talk with your physician about a mammography schedule that is appropriate for you based on your overall health and medical history, risk factors, and personal opinion or preference.
According to the National Cancer Institute, women in their 40s and older should begin having a screening mammogram on a regular basis, every one to two years. But, the American Cancer Society recommends that by age 40, women should have a screening mammogram every year. (A diagnostic mammogram may be required when a questionable area is found during a screening mammogram.)
Both organizations suggest that women who may be at increased risk for breast cancer should talk with their physicians about whether to begin having mammograms at an earlier age.