Meaning: Need additional imaging.
Next Step: More views, ultrasound, or compare with older images.
Risk: Unknown (needs clarification).
Meaning: No abnormal findings.
Next Step: Routine annual screening.
Risk: Very low (0%).
Meaning: Clearly non-cancerous (like cysts or fibroadenomas).
Next Step: Routine screening.
Risk: 0% (no cancer).
Meaning: Likely non-cancerous.
Examples: Complicated cysts, stable nodules.
Next Step: Short-term follow-up (6-monthly).
Risk: Less than 2%.
Meaning: May be cancerous. Needs biopsy.
Subcategories:
Next Step: Biopsy recommended.
Meaning: Very likely cancer.
Next Step: Immediate biopsy and treatment planning.
Risk: >95% chance of malignancy.
Meaning: Already confirmed cancer by biopsy.
Next Step: Continue with treatment and staging.
Risk: 100% (confirmed malignancy).
| BI-RADS | Meaning | Cancer Risk | Action |
|---|---|---|---|
| 0 | Incomplete | Unknown | More imaging needed |
| 1 | Negative | ~0% | Routine screening |
| 2 | Benign | ~0% | Routine screening |
| 3 | Probably Benign | <2% | Short-term follow-up |
| 4A/4B/4C | Suspicious | 2–95% | Biopsy recommended |
| 5 | Highly Suggestive of Malignancy | >95% | Biopsy and treatment |
| 6 | Known Malignancy | 100% | Treatment in progress |
