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The purpose of screening is early diagnosis and treatment. Screening tests are administered to people without current symptoms, but who may be at average or high risk for certain diseases or conditions.
Several professional organizations have published sometimes differing guidelines for breast cancer screening. Though this may seem confusing, the ultimate goal is to encourage individuals to discuss the risks, harms, and benefits of different breast cancer screening tests with their doctor.
The most current guidelines below are from the United States Preventive Services Task Force, the American Cancer Society, and the American Congress of Obstetricians and Gynecologists.
Screening Guidelines for Average Risk
||No recommendation given.||Not recommended.|
||Not recommended.||Not recommended.|
||Encourage breast self-awareness.
Breast self-awareness is very important at any stage of life. Be aware of any changes, such as new or disappearing lumps, clear or bloody nipple discharge, dimpling or thickening of the skin, pain, or a feeling of fullness in the underarm area. Not all breast cancers cause symptoms and not all breast changes are caused by cancer, but it is important to discuss these with your doctor so they can determine if further testing is needed.
Screening Guidelines for High Risk
If you are in a high-risk group for developing breast cancer, you and your doctor will schedule more frequent screening tests, which will start at an earlier age.
The American Cancer Society recommends a yearly mammogram with an MRI scan starting at age 30 years for women with:
- A high risk assessment score
- One of the BRCA genes—if tested
- First-degree relative with one of the BRCA genes—if not tested
- A history of high-dose radiation to the chest from ages 10-30 years
- A personal history or first-degree relative with certain syndromes that increase risk of breast cancer, such as Li-Fraumeni, Cowden, or Bannayan-Riley-Ruvalcaba
The United States Preventive Services Task Force recommends:
- Monthly breast self-exams for women aged 18-21 years
- For women aged 25-35 years:
- Clinical breast exam every 6-12 months
- Yearly mammogram
The American Congress of Obstetricians and Gynecologists recommends that high-risk women consider doing regular breast self-exams.
There are 3 main tests to screen women for breast cancer. Not all organizations recommend these methods, but you may choose to do them after you discuss the risks, harms, and benefits with your doctor. These include:
- —Overall, there is a a lack of evidence that breast self-exams are effective in reducing the risk of death from cancer. A self-exam can cause unnecessary anxiety. Before you do breast self-exams, talk to your doctor about proper technique.
- —The doctor will carefully feel your breasts and under your arms to check for lumps or other unusual changes.
- —An imaging test that takes an x-ray of the breast, which may detect tumors that are too small to be felt. The accuracy of a mammogram to detect cancer depends on several factors including the density of breast tissue. Although a mammogram is the most sensitive test currently used to evaluate the breast, it will miss 10%-15% of breast cancers. Mammograms can also indicate a tumors when there is no tumor almost 1/3 of the time. The possibility for this false-positive is one of the reasons some organizations changed screening guidelines.
Other Imaging Tests
MRI scans may be used to screen high-risk women.