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Mammogram
How screening mammograms work and how to prepare for one.
Overview
A mammogram is an X-ray picture of the breast. Screening mammograms can find breast cancer early, often before it can be felt.
When to start
Recommendations vary with age and risk. Talk with your care team about when to begin screening and how often to repeat it.
Preparing
- Schedule it for a time when your breasts are least tender
- Skip deodorant, powder or lotion under your arms that day
- Bring prior mammogram results if you had them elsewhere
After the test
A radiologist reviews the images. Being called back for more pictures is common and usually does not mean cancer.
Last reviewed: October 1, 2026