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Benefits and Limitations of Mammograms

Having a screening mammogram is a personal choice. Understanding the benefits and limitations of screening mammogram can help you decide whether breast screening is right for you.

Benefits

Mammograms can find breast cancer early

  • Usually find lumps up to two or three years before they can be felt or symptoms appear.

Early detection may improve treatment options

  • Breast cancers found early may be easier to treat and may provide more treatment options.

Regular screening can save lives

  • Regular screening with mammography can reduce the risk of dying from cancer. 

Peace of mind

  • Most people screened do not have breast cancer, and a normal result can be reassuring.

 

Limitations

Mammograms are not perfect

  • Some breast cancers cannot be seen on a mammogram because of the location/type of the cancer or density of the breast tissue. 
  • The test may not detect cancer even though it is present (called a false negative).
  • A normal mammogram does not guarantee that breast cancer is not present.

Breast cancer can develop between screening appointments

  • Cancers can develop between mammograms. This is why regular screening is important to allow the radiologist to look for subtle changes between visits.

Additional testing may be needed

  • Sometimes mammogram test results suggest you have breast cancer even though you don't (called a false positive). 
  • Most people who return for additional testing do not have breast cancer. Additional testing may cause temporary discomfort or anxiety.

Mammograms use a small amount of radiation

  • Mammograms use a very small amount of radiation.
  • For most people, benefits outweigh the risks associated with this low level of exposure.

📌 Note: Even if your mammogram is normal, contact your healthcare provider, if you notice:

  • A new lump, mass in your breast or underarm
  • Changes in breast size or shape
  • Nipple discharge
  • Changes to the skin of the breast or nipple
  • Persistent, non-cyclical focal breast pain
  • For more information refer: NSBSP-FactSheet-Oct15 NewLogos.indd


     

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Nova Scotia Breast Screening Program
603L-7001 Mumford Road
Halifax, Nova Scotia B3L 2H8
Canada

Contact

Book your screening mammogram by calling:

1-800-565-0548

Monday - Friday, 8:00am - 5:00pm