For decades, the standard advice for most women has been to start annual mammograms at age 40. But new recommendations from the American College of Radiology (ACR) are shifting that timeline significantly earlier. According to recommendations published by the ACR, all women should have a formal breast cancer risk assessment by age 25. This is a major departure from the age-40 threshold that has long dominated public health messaging.
The change matters because breast cancer is not a single disease with a single risk profile. While one in eight women will develop breast cancer in their lifetime, risk varies widely based on family history, genetic mutations, and other factors. For some women, particularly those with a strong family history or known genetic mutations like BRCA1 or BRCA2, waiting until 40 to begin screening could mean missing the window when cancer is most treatable. The ACR's new guidance aims to identify these higher-risk individuals early, allowing for personalized screening strategies that may include earlier mammography, supplemental imaging such as MRI, or more frequent exams.
The recommendations place particular emphasis on Black women and women of Ashkenazi Jewish descent, who may face elevated risk factors or worse outcomes. Black women, for example, are more likely to be diagnosed with aggressive subtypes of breast cancer at younger ages and have higher mortality rates. Among Asian, Black, and Hispanic women, one-third of all breast cancers are diagnosed before age 50. This stark statistic underscores why age-based screening alone is insufficient. A risk assessment by 25 can flag those who need to start screening earlier, potentially catching cancers when they are smaller and easier to treat.
"Breast cancer screening is not a one-size-fits-all approach," said Stamatia Destounis, MD, FACR, chair of the American College of Radiology Breast Imaging Commission. "A risk assessment by age 25 can help identify those who may benefit from earlier screening or supplemental imaging. Understanding your personal risk allows people and their healthcare providers to make informed decisions based on their unique circumstances."
The implications extend beyond just starting mammograms sooner. A formal risk assessment can also lead to more tailored follow-up, including genetic counseling and testing when appropriate. For transgender individuals, risk assessment is equally important, as factors such as anatomy, hormone use, family history, and prior medical care can influence breast cancer risk. A personalized approach ensures that screening recommendations reflect each person's specific health history rather than a generic age cutoff.
Resources are available to help patients and providers navigate these conversations. The ACR's educational initiative, Mammography Saves Lives, offers information on risk factors, breast density, and questions to discuss with healthcare providers. As Breast Cancer Awareness Month highlights the importance of early detection, the message is clear: knowing your risk by age 25 is not just a suggestion—it is a crucial step toward better outcomes. For more information, visit mammographysaveslives.org.
