This information is for educational purposes only and is not a diagnosis. Always follow up with your physician or healthcare provider regarding your results and next steps.
Whether you’re getting your first breast ultrasound or your fifth, it’s completely normal to feel nervous. You may be hoping for peace of mind. Maybe you just want a simple, reassuring result so you can move on with your day. That’s why getting called back for additional screening can feel so unsettling.
A false positive happens when a screening spots something that appears abnormal, but follow-up testing shows there is no cancer or serious condition present. While the result is ultimately reassuring, the extra testing and waiting can still make an otherwise routine visit feel a little more stressful than expected. At HerScan, we believe understanding the process can help make each step feel more manageable and empowering.
The truth is, many women don't realize just how common a false positive is. Ultrasounds are meant to be cautious. They are supposed to detect the smallest abnormality as early as possible. False positives aren't mistakes. Instead, they are a normal part of how ultrasound technology works.
Continue reading to learn more about what a false positive ultrasound screening result means.
You may expect an ultrasound to provide a simple yes-or-no answer. In reality, detecting breast abnormalities is more like detective work. Each ultrasound provides more clues about what is going on inside your body.
The first ultrasound looks broadly at the breast tissue. If the radiologist sees an area that is unclear or different, then an additional ultrasound helps fill in those details. Even with that knowledge, you still may feel nervous when you get the call that more follow up is needed. Try to remember that getting a follow up screening doesn't mean something is wrong. It means your care team is being thorough.
Here are a few things to remember about false positives:
Follow-up imaging is especially common during a first screening. Without previous images for comparison, normal variations can look unfamiliar. Additional views help establish what is normal for you.
False positives are more common than many people expect. In breast screening overall, about 10% of mammograms lead to a callback for additional testing. However, only a small portion of those callbacks result in a cancer diagnosis.
For breast ultrasound screenings, false positives are fairly common when ultrasound is used as a supplemental screening after a normal mammogram in women with dense breasts. For every 1,000 women screened, approximately 75 to 117 are false positive recalls, which is roughly 8-12%.
This means that most follow-up appointments end with reassurance.
Screening tools like ultrasound are intentionally sensitive. They pick up subtle differences in tissue. That sensitivity helps doctors detect potential concerns early, but it also means more findings that need clarification. Although being called back can feel stressful, it reflects a cautious and protective approach to your care.
An ultrasound uses sound waves to create images. As the sound waves travel through the breast tissue, tiny differences in the breast tissue can affect how the waves travel. Sound waves can pass easily through fatty tissue. Dense or fibrous tissue can block the waves, which creates shadows on the ultrasound. These shadows can look suspicious and lead to a false positive.
Common benign findings that may resemble something concerning include:
Screening tools like ultrasounds are intentionally cautious. They highlight anything that could need follow-up imaging or further testing. This "better safe than sorry" approach helps ensure that the medical team doesn't miss cancer cells.
False positives aren't limited to breast ultrasounds. False positives happen with all screening tests, including MRI and mammography.
False positives are more common in:
Research also suggests that false positives become more likely over time. In the U.S., more than half of women who are screened annually for 10 years will experience at least one false positive.
If your ultrasound picks up a shadow or other suspicious spot, your doctor may recommend more diagnostic imaging to take a closer look at one area. Diagnostic imaging is different from routine screening in two key ways: intent and duration.
Diagnostic imaging is more focused than screening imaging. Diagnostic imaging gives your medical team a clear, detailed picture of one area. The technologist may take multiple images from different angles. You can expect these appointments to take a little longer than the first ultrasound.
Depending on what the ultrasound shows, your doctor may recommend:
Most follow-up exams confirm that the finding is benign. Once that happens, you typically return to your regular screening schedule.
Research shows that after a false positive, many women hesitate or avoid future screening.
However, after a false positive, it's important to continue regular screening. Even though the experience may feel frustrating, the tests help rule out cancer and give you reassurance. Your ultrasound did what it was designed to do. It looked carefully and flagged something worth checking.
Breast cancer screening guidelines vary based on your age and personal risk factors. Many organizations now recommend starting regular screening at age 40 and continuing through age 74.
General recommendations often include:
Ages 40–49
Ages 50–74
Higher-risk individuals
Your doctor can help you determine the screening schedule that best fits your personal health history.
Your breast ultrasound screening is designed to be cautious. At HerScan, our goal is to identify anything that may need a closer look. This approach prioritizes early detection.
Here are some of the benefits of HerScan:
If you receive a false positive after your screening, remember that it is a normal part of the process. It doesn't automatically mean something is wrong. In many cases, additional imaging simply confirms everything is normal.