Probably Benign
What does an assessment of “Probably Benign” mean?
A “Probably Benign” assessment means that the interpreting physician noted an abnormality within the images but has determined that this finding is most likely not cancerous. According to the ACR BI-RADS Atlas, some examples of findings that are typically given the assessment outcome of “probably benign” are “noncalcified circumscribed solid mass, focal asymmetry, and solitary group of punctate calcifications” (Sickles et al., 2013).
What is the BI-RADS classification relating to a “Probably Benign” assessment?
The BI-RADS classification for “Probably Benign” is Category 3: Probably Benign.
What is the difference between a “Benign” and a “Probably Benign” assessment?
The evaluations of “benign” and “probably benign” are similar, but some differences exist. A “probably benign” assessment means that a benign finding is most likely not malignant, and the window for follow-up shortens from 12 months to 6 months. Since there is a slightly higher chance that the finding is malignant with a “probably benign” assessment, a shorter window for follow-up is recommended to detect possible changes within the abnormality.
What is the probability of malignancy for an individual evaluated as “Probably Benign”?
The likelihood of cancer for an individual evaluated as “probably benign” is greater than 0% but less than or equal to 2%.
What is the recommended follow-up for individuals who receive a “probably benign” assessment outcome?
The BI-RADS Atlas recommends short-interval follow-up (approximately six months) or continued surveillance mammography for individuals with a “probably benign” assessment outcome.
Why is an assessment of “Probably Benign” not recommended as an interpretation outcome of screening mammograms?
The ACR BI-RADS Atlas does not recommend using the assessment of “probably benign” for screening mammograms. Studies examining this topic have indicated that a complete diagnostic examination is necessary to evaluate “probably benign” to prevent possible negative outcomes that may come with interpreting a screening mammogram as “probably benign.” (Sickles et al., 2013).
Sources:
BreastCancer. (n.d.). Breast Imaging Reporting and Data System (BI-RADS). https://www.breastcancer.org/symptoms/testing/types/mammograms/results
Sickles, EA, D'Orsi CJ, Bassett LW, et al. (2013). ACR Bl-RADS Mammography. In: ACR Bl-RADS Atlas, Breast Imaging Reporting and Data System. American College of Radiology. https://www.acr.org/Clinical-Resources/Reporting-and-Data-Systems/Bi-Rads#Mammography