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Screening and Diagnostic Mammograms

Which is Better?

Picture of a woman getting a mammogram.

A screening mammogram helps detect breast cancer in the early stages, before it has spread. Screening mammograms are recommended annually for women who are 40 years or older, as well as those who may be at higher risk for breast cancer (e.g., family history). The American Cancer Society recommends a yearly mammogram for women ages 40 and older. The exam takes about 15 minutes and usually includes taking two radiographic images of each breast. Learn more at Mammography Saves Lives.

A diagnostic mammogram provides a more detailed X-ray of the breast. It is used to further investigate suspicious changes found on a screening mammogram.

A diagnostic mammogram may be needed if there is:

  • Breast pain
  • Make An Appointment

    Call 619-543-3405

    Breast Imaging Services Locations

    La Jolla
    Moores Cancer Center
    MonThu: 7:30 a.m. – 6:30 p.m.
    Fri: 7:30 a.m. – 4:30 p.m.
    Sat: Please call for hours

    Hillcrest
    4th and Lewis Medical Offices
    MonFri: 8:30 a.m. – 4:30 p.m.

  • Nipple discharge
  • Skin thickening
  • A lump
  • Changes in breast size or shape

bulletSee what to look for when performing a breast self-exam at home.

Mammograms: Important Things to Know

A Call Back Does Not Mean Cancer

The majority of women have normal mammogram screenings. In some circumstances, patients are asked to come back for additional mammogram views and/or ultrasound. This does not mean that you have cancer or will require a biopsy, only that additional imaging is needed to evaluate an area. Our schedulers will call you to arrange an appointment for a diagnostic mammogram and/or ultrasound at the earliest opportunity.

If you need a biopsy or follow-up surgical consult, you will be referred to the Comprehensive Breast Health Center.

Health Library

To learn more, visit our Health Library.

10 Percent of Cancers Cannot Be Seen

Mammography is not perfect; about 10 percent of cancers cannot be seen. If you have a lump, mass, or other specific problems related to your breasts, you should inform your primary doctor and make sure that you receive appropriate follow-up care.

Preparing For Your Mammogram

On day of your mammogram, it's important that you do not wear deodorant, lotion or powder. If you are breastfeeding, it is best to schedule your screening mammogram for at least three months after you have stopped nursing.

If you have had a mammogram at another center, please arrange with that facility to get a CD or original images of your mammogram. Bring these with you the day of your exam or you can mail ahead of time. We can also obtain your records from another facility for you (ask our office for the necessary forms).

Breast Density Notification

As of April 1, 2013, California legislation requires that all patients receiving a mammogram be notified if they have dense breast tissue. Dense breasts are normal. We have always reported breast density to your doctor, but are now mandated by the state to inform you as well. We encourage you to talk to your primary care provider about any further questions you may have. ​bulletLearn more.