New Study Reveals that Better Breast Screening May be More Effective than Mammograms

Breast cancer is the most common cancer among women, with about one in eight women in the United States being diagnosed with the disease in their lifetime. Black women, in particular, face higher rates of more aggressive subtypes of breast cancer—such as triple-negative breast cancer (TNBC) and inflammatory breast cancer—and are often diagnosed at more advanced stages.

Screenings, such as mammograms, have long been the gold standard for early detection. However, growing research suggests that routine screening may not fully account for a patient’s individual risk of developing breast cancer.

A recent study from the University of California, San Francisco, suggests that personalized, risk-based screening may improve outcomes while reducing unnecessary harms.

The Limitations of One-Size-Fits-All Mammography

A mammogram is a routine breast screening that uses low-dose X-rays to detect cancer. Most major health organizations recommend that women between the ages of 40 and 74 receive regular mammograms.

While mammograms can be effective in detecting cancer before it causes symptoms, they do have a few limitations, including:

• False negatives: Mammograms miss about one in eight breast cancers. Women with dense breast tissue are more likely to receive false-negative results.
• False-positives: Mammograms may incorrectly suggest cancer, particularly in younger women, those with dense breasts, a history of breast biopsies, a family history of breast cancer, or those taking estrogen. This can lead to unnecessary stress and follow-up testing.
• Overdiagnosis and overtreatment: Some cancers detected through screening may never grow or spread. Treating these cancers can expose patients to unnecessary procedures and side effects.
• Radiation exposure: Mammograms use low levels of radiation. While the risk is considered minimal, repeated exposure over time is still taken into account when evaluating screening strategies.

Although mammograms can be life-saving, they may not be the most effective screening approach for every patient.

What the UCSF Study Looked At

The UCSF study, published in JAMA Network, used large-scale modeling to compare traditional breast screening with personal, risk-based strategies. Researchers examined outcomes such as advanced cancer diagnosis, screening frequency, and overall safety. 

The analysis focused on women aged 40 to 74 who had no prior history of breast cancer or ductal carcinoma in situ (DCIS). Rather than relying on age alone, risk-based screening schedules were tailored using individual risk factors, including:

• Family history
• Genetics
• Breast density
• Prior breast biopsies
• Race-related risk patterns

At the study’s conclusion, researchers found that it was possible to reduce diagnoses of advanced breast cancer while ensuring patients received appropriate levels of screening.

Why These Findings Matter for Black Women

Black women are more likely to develop aggressive forms of breast cancer, including TNBC and inflammatory breast cancer. Structural barriers to care—such as delayed diagnosis and limited access to follow-up—also play a significant role in poorer outcomes.

Personalized breast cancer screening could help identify higher-risk Black women earlier and support recommendations for more frequent or earlier screening when needed. At the same time, it could reduce unnecessary screening among lower-risk individuals, helping prevent overdiagnosis and overtreatment.

What This Means for Patients Right Now

While this research is promising, current guidelines from organizations such as the U.S. Preventive Services Task Force (USPSTF), the American Cancer Society (ACS), and the American College of Obstetricians & Gynecologists (ACOG) have not yet changed. 

For now, Black women are encouraged to talk with their healthcare providers about their personal breast cancer risk. Asking questions about breast density, family history, and whether additional or earlier screening may be appropriate can be an important step toward informed care.

Mammograms remain an important tool—but the evolving research shows that smarter, more personalized breast cancer prevention may help ensure women receive the right care at the right time.

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