The results of your mammogram will include a Breast Imaging Reporting and Data System Assessment category. This is a classification that radiologists use to report the likelihood for breast cancer.

The BI-RADS classification was developed by the American College of Radiology to create a uniform way for radiologists to report mammogram findings. It includes seven categories of findings, which suggest a follow-up plan that can help guide radiologist and physicians in providing your care.

The system uses a 0-6 classification for the Level of Suspicion or possibility cancer may be present.

Breast Imaging Reporting and Database System (BI-RADS)
Category	Assessment	Follow-up
0	Need additional imaging evaluation and/or prior mammorgrams for comparison	Additional imaging and/or prior mammograms for comparison needed before a category can be assigned
1	Negative	Continue annual screening mammography (for women over age 40)
2	Benign (noncancerous) finding	Continue annual screening mammography (for women over age 40)
3	Probably benign	Receive a 6-month follow-up mammogram and/or ultrasound
4	Suspicious abnormality	Biopsy should be considered
5	Highly suggestive of malignancy(cancer)	Requires biopsy
6	Known biopsy—proven malignancy (cancer)	Biopsy confirms presence of cancer before treatment begins

To learn more about the BI-RADS system, visit the American College of Radiology.