Navigating the confusing maze of breast cancer screening guidelines

When actress Olivia Munn revealed her breast cancer diagnosis in 2024, it sparked a massive, much-needed public conversation about early detection.

Munn was just 43, had a clear routine mammogram, and tested negative for the well-known BRCA genetic mutations. Her aggressive cancer was only caught because her doctor calculated her Breast Cancer Risk Assessment Score, which flagged her for a life-saving MRI.

Munn’s story highlights growing confusion surrounding breast cancer screening guidelines. With various health organizations shifting their recommendations recently, many women are left completely unsure about when to start screening, how often they need to go, and whether a standard mammogram alone is actually enough to protect them.

The urgency to clear up this confusion and establish personalized risk has never been greater. According to the American Cancer Society, breast cancer incidence rates have steadily risen over the past decade, with a steeper increase of 1.4% per year among women under 50.

To help clear up the screening confusion, breast imaging and surgical experts at Hackensack Meridian Health (HMH) are available for comment.

The Root of the Confusion: Competing Guidelines

Different health organizations offer slightly different mammogram guidance. Here is the current breakdown for average-risk women, simplified:

• U.S. Preventive Services Task Force (USPSTF): In April 2024, the USPSTF updated its guidelines, lowering the recommended starting age for mammograms from 50 to 40. However, they recommend biennial (every other year) screening through age 74. (Source: USPSTF)
• American Cancer Society (ACS): Recommends women have the choice to start annual screening at 40, but strongly recommends starting annual mammograms at age 45. At age 55, women can transition to every other year or continue annually. (Source: American Cancer Society)
• American College of Radiology (ACR): Recommends annual screening starting at age 40. Additionally, the ACR urges all women to have a formal breast cancer risk assessment by age 25 to determine if they need to start screening even earlier. (Source: American College of Radiology)

The National Comprehensive Cancer Network (NCCN), American Society of Breast Surgeons (ASBrS) and American College of Gynecologists (ACOG) also recommend that women at average risk start annual mammograms at age 40. For women at elevated risk, screening may begin earlier and include MRI.

Current Statistics & Recent Studies

• A Growing Issue: In 2026, an estimated 322,000+ new cases of invasive breast cancer will be diagnosed in U.S. women. DCIS accounts for about 60,000 new breast cancer diagnoses this year. (Source: American Cancer Society)
• The Science Behind the Shift: A major 2024 modeling study published in JAMA supported the USPSTF’s decision to lower the screening age. The study found that starting screening at age 40 rather than 50 provides a greater reduction in breast cancer mortality – a vital shift given the rising incidence of breast cancer in younger women and higher mortality rates in Black women.

• Common Questions Women Have (And How to Approach Them)

When should I actually start? While guidelines vary slightly on frequency, medical consensus now agrees that age 40 is the baseline to begin mammograms. However, women should talk to their doctors by age 25 to establish their personal risk.

• What if I have “dense breasts”? Dense breast tissue is common but makes it harder for radiologists to spot tumors on standard mammograms. Thanks to a recent FDA update that took effect in late 2024, all mammogram facilities must now inform patients if they have dense breasts so they can seek supplemental screening like an ultrasound or MRI.
• Are mammograms covered by insurance? Yes. Under the Affordable Care Act, screening mammograms are covered without copays starting at age 40.
• I have no family history. Do I still need to worry? Yes. In fact, most women diagnosed with breast cancer have no known family history.

Hackensack Meridian Health Experts Available for Interview

The Radiologist’s Perspective:

• Harriet Borofsky, M.D., Medical Director, Breast Imaging, Riverview Medical Center: ”With the recent shift in screening guidelines, women may not be clear on when to start mammograms and how often to get them. Age is only one part of the equation. Women with dense breast tissue should know mammograms are an essential part of their screening because most (about 80%) of breast cancers form calcifications, which are detectable only on mammograms regardless of tissue density. But mammograms alone may not be enough. Additional (supplemental) screening with ultrasound, contrast-enhanced mammography, or MRI may be indicated based on risk. These findings are why risk assessment (starting at age 25) and personalized screening recommendations are crucial.”

The Breast Surgeon’s Perspective:

• Roshani Patel, M.D., FACS, Medical Director, Breast Surgical Oncology, Jersey Shore University Medical Center: “The varying screening guidelines often focus on ‘average-risk’ women, which unfortunately causes many to overlook their own hidden risks, like genetic mutations. While BRCA1 and 2 are the most well-known, mutations like CHEK2 are also very common and drastically increase breast cancer risk. As a breast surgeon, I urge women to establish their baseline risk early. Catching cancer early through appropriate, individualized screening doesn’t just save lives – it gives patients far more options for less invasive surgeries and treatments.”
• Preeti Subhedar, M.D., FACS, Director, Breast Surgery, Central Region, HMH; Breast Surgery Site Chief, JFK University Medical Center: “We are increasingly treating women in their 30s and 40s for breast cancer, proving that this disease does not strictly adhere to age-based guidelines. The most dangerous misconception caused by conflicting recommendations is that younger women shouldn’t worry about breast health. Women need to be proactive, learn their family history on both their mother’s and father’s sides, and advocate for themselves. If you feel a lump or notice a change, do not wait for the ‘recommended screening age’ to get evaluated – seek care immediately.”

Additional information on breast cancer screening, risk factors, and treatment options is available at: https://www.hackensackmeridianhealth.org/en/services/cancer-care/breast-cancer. 

By Hackensack Meridian Health for Newswise. The Gayly online. 10/25/26 @ 6:31 p.m. CST.