Table 1.

Description and assessment of BI-RADS categories for mammograms.

BI-RADS	Definition	Management	Likelihood of Cancer
0	Incomplete, need additional imaging evaluation	Recall for additional imaging and/or awaiting prior examinations	–
1	Negative (normal)	Routine screening	0%
2	Benign	Routine screening	0%
3	Probably benign	Short-interval follow-up or continued	>0% to ≤2%
4A	Low suspicion of malignancy	Tissue diagnosis	>2% to ≤10%
4B	Moderate suspicion of malignancy	Tissue diagnosis	>10% to ≤50%
4C	High suspicion of malignancy	Tissue diagnosis	>50% to <95%
5	Highly suggestive of malignancy	Tissue diagnosis	≥95%
6	Known biopsy-proven malignancy	Surgical excision when clinically appropriate	100%