Table 1.

Breast imaging reporting and database system[73]

Category	Assessment	Follow up
0	Need additional imaging evaluation	Additional imaging needed before a category can be assigned
1	Negative	Continue annual screening mammograms (women older than 40 yr)
2	Benign	Continue annual screening mammograms (women older than 40 yr)
3	Probably benign	Initial short term follow-up (usually six month) mammogram (< 2% chance of malignancy)
4	Suspicious abnormality	Biopsy should be considered (2%-95% chance of malignancy)
5	Highly suggestive of malignancy	Requires biopsy (> 95% chance of malignancy)
6	Known cancer	Biopsy-proven malignancy