The purpose of screening is early diagnosis and treatment. Screening tests are usually administered to people without current symptoms, but who may be at high risk for certain diseases or conditions.
When to get screened can be confusing because there are several organizations that recommend different screening schedules. Below are 2009 recommendations from the United States Preventive Services Task Force (USPSTF), the American Cancer Society (ACS), and the American Congress of Obstetricians and Gynecologists (ACOG).
Talk to your doctor about the right screening schedule for you. For example, if you are at high risk for breast cancer, you will need to start having mammograms at an earlier age.
Follow these links to learn more bout breast cancer screening:
- Breast cancer screening: research and guidelines
- Decision making tool: should I have a mammogram?
When doing a breast self-exam, you feel for anything new or different. You will be able to feel a particularly lumpy portion of the breast. Sometimes cysts appear and disappear. Masses that come and go are generally not cancerous. Other than new lumps, look for nipple discharge (either clear or bloody), dimpling of the skin, thickening of the skin, redness of the skin, pain, new lumps, or a fullness feeling in the armpit.
There is a lack of evidence that breast self-exams can reduce your risk of death from breast cancer. The USPSTF does not recommend this self-screening, and the ACS views the exam as optional for women aged 20 and older. ACOG recommends it.
If you are unsure as to whether you should do a breast self-exam, talk to your doctor. To learn how to do the exam, click here.
Clinical Breast Exam
During your routine physical exam, your doctor may do a clinical breast exam. Your doctor will carefully feel your breasts and under your arms to check for lumps or other unusual changes. The ACS recommends that women aged 20-39 have the exam every three years, and every year for women aged 40 and older. The ACOG's guidelines are for women to have this exam every year. USPSTF has no recommendations for this exam.
A mammogram is a special x-ray of the breast that may be able to find tumors that are too small for you or your doctor to feel. The ability of mammogram to detect cancer depends on such factors as the size of the tumor, your age, breast density, and the skill of the radiologist. Your doctor may suggest that you have a mammogram, especially if you have risk factors for breast cancer.
Guidelines for getting a mammogram vary depending on the organization:
- USPSTF o 40-49 years—the decision to have a mammogram every two years is an individual one. You should make your decision after you understand the risk and benefits that apply to you. Talk to your doctor. o 50-74 years—every two years
- ACS o 40-49 years—every year o 50-74 years—every year
- ACOG o 40-49 years—every 1-2 years o 50-74 years—every year
The USPSTF, the ACS, and the ACOG do not give specific guidelines as to when women should stop having mammograms. But, the American College of Radiology and the Society of Breast Imaging recommend that mammograms should end when an older woman's health is poor and treatment would not be beneficial.
Magnetic Resonance Imaging (MRI)
MRI is a procedure in which a magnet linked to a computer is used to create detailed pictures of areas inside the body. MRIs are used to evaluate breast masses that have been found by BSE or CBE and to recognize the difference between cancer and scar tissue. This type of imaging test is also used in women with a diagnosis of breast cancer to search for other lesions that may not be seen on mammography.
The use of breast MRI has increased lately. But, this test is not for all women. You and your doctor can discuss whether an MRI is the right test for you.
Click here to read more about MRIs for breast cancer.
During an ultrasound, sound waves are bounced off tissues, and the echoes are converted into a picture (sonogram). An ultrasound may be used in cancer screening if you:
- Are at high risk for breast cancer and cannot have an MRI
- Have dense breast tissue
This test can also be used to evaluate lumps that have been identified by a BSE, CBE, or mammography.
Breast cancer. National Cancer Institute website. Available at: http://www.cancer.gov . Accessed January 27, 2006.
Breast cancer screening: research and guidelines. EBSCO Health Library website. Available at: http://www.ebscohost.com/thisTopic.php?marketID=15topicID=81 . Updated November 2009. Accessed January 19, 2010.
Calvagna M. Breast self-exam (BSE). EBSCO Health Library website. Available at: http://www.ebscohost.com/thisTopic.php?marketID=15topicID=81 . Updated May 2008. Accessed January 19, 2010.
Detailed guide: breast cancer. American Cancer Society website. Available at: http://www.cancer.org . Accessed January 27, 2006.
10/23/2009 DynaMed Systematic Literature Surveillance http://www.dynamicmedical.com/what.php : Nothacker M, Duda V, Hahn M, et al. Early detection of breast cancer: benefits and risks of supplemental breast ultrasound in asymptomatic women with mammographically dense breast tissue. A systematic review. BMC Cancer. 2009;9:335.
1/19/2010 DynaMed's Systematic Literature Surveillance http://www.ebscohost.com/dynamed/what.php : Lee C, Dershaw D, Kopans D, et al. Breast cancer screening with imaging: recommendations from the Society of Breast Imaging and the ACR on the use of mammography, breast MRI, breast ultrasound, and other technologies for the detection of clinically occult breast cancer. J Am Coll Radiol. 2010;7(1):18.
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