What does BI-RADS 6 mean? Learn why BI-RADS 6 is used after cancer has already been confirmed by biopsy and how it differs from BI-RADS 5.
What Is BI-RADS 6?
Seeing BI-RADS 6 on a breast imaging report can be confusing.
You may wonder:
“Is BI-RADS 6 more suspicious than BI-RADS 5?”
Not exactly.
BI-RADS 6 has a very specific meaning:
Known biopsy-proven malignancy.
This means a biopsy has already confirmed cancer, and the imaging is being performed in the setting of that known diagnosis.
BI-RADS 5 vs. BI-RADS 6
This is the most important distinction.
BI-RADS 5
Highly suggestive of malignancy
The imaging appearance is very suspicious, but tissue diagnosis has not necessarily been established yet.
BI-RADS 6
Known biopsy-proven malignancy
Cancer has already been confirmed by pathology.
So BI-RADS 6 isn’t simply “one level more suspicious” than BI-RADS 5.
The difference is whether malignancy has already been established by biopsy.
Why Is Imaging Still Needed After a Biopsy?
Even after a diagnosis has been established, breast imaging can still provide important information.
Depending on the clinical situation, imaging may help doctors:
- Evaluate the known cancer
- Assess the extent of disease
- Look for additional findings
- Plan treatment
- Evaluate response to treatment
The exact imaging plan depends on the individual patient.
Does BI-RADS 6 Mean Stage 6 Cancer?
No.
This is an important misconception.
BI-RADS categories are not cancer stages.
There is no connection between “BI-RADS 6” and a “stage 6” breast cancer.
BI-RADS describes breast imaging assessments, while cancer staging is a completely different system.
Key Takeaways
✔ BI-RADS 6 = Known biopsy-proven malignancy
✔ Cancer has already been confirmed by tissue diagnosis.
✔ It is different from BI-RADS 5.
✔ BI-RADS numbers are not cancer stages.
✔ Imaging may still be important for treatment planning and follow-up.
