Mammograms

What is a mammogram?

A mammogram is a low-dose x-ray that examines breast tissue.

When is it used?

A mammogram helps detect breast cancer at an early stage. Mammograms can detect some types of cancer before you or your health care provider can feel a lump. They detect about 90% of cancerous lumps.

Mammograms are also used to check lumps you or your health care provider have found in a physical exam. They can help determine which lumps are cancerous and which are benign. However, all suspicious lumps should be biopsied or removed, even when the lump appears noncancerous (benign) on a mammogram. Mammograms can show where a lump is located in the breast before surgery or biopsy is done to remove it.

How do I prepare for a mammogram?

Be sure your underarms and chest are clean. Don't put any deodorants, powders, or perfumes on your underarms or chest on the day your mammogram is to be done. These products can make it difficult to interpret the test results correctly.

What happens during the procedure?

A mammogram is done in your health care provider's office or an x-ray clinic. You will be asked to take off your shirt, bra, and jewelry. It takes just a few minutes for the technologist to use a large machine to take x-rays of each breast. Usually two views are taken of each breast. You will feel some pressure when your breasts are pressed between two plates for the x-rays. Each x-ray position requires just a few seconds.

What happens after the procedure?

Ask your health care provider how you will be notified of the results and when you should have another mammogram.

If you are 40 to 49 years old, you should have a mammogram every 1 to 2 years, depending on your personal and family history. At age 50 and after, you should have a mammogram every year. Comparing mammograms from year to year helps detect early cancer.

Your health care provider should give you a breast exam once a year. In addition, you should do a breast self-exam every month, even if you have an exam by your provider and a mammogram every year.

What are the benefits of this procedure?

Mammograms help your health care provider diagnose breast problems. Most commonly, they help find breast cancer at an early stage. One out of every eight women in the US will develop breast cancer in their lifetimes. The smaller and the more localized a cancer is at the time of diagnosis and treatment, the greater the chance of a cure. The mammogram allows the detection of some types of breast cancer 1 to 2 years before you or your health care provider would be able to feel it. There is a better chance of curing the cancer if it is found at an early stage.

What are the risks associated with this procedure?

There are no known significant risks from having mammograms according to the recommended screening schedule. Discuss any concerns you have with your health care provider.

When should I call my health care provider?

• Call your health care provider right away for an appointment if you find any change in your breasts when you do a self-exam, especially if you find a lump.
• Call your health care provider during office hours if you have questions about the procedure or its result.