BIRADS

BIRADS 0: Needs additional imaging evaluation:Abnormality on screening mammogram for
which diagnostic mammogram and/or ultrasound is recommended. May also use this
if prior outside comparison is required for interpretation.


BIRADS 1: Negative mammogram: Normal


BIRADS 2: Benign finding: Either characteristic benign appearance or a known prior biopsied lesion


BIRADS 3: Probably benign finding, initial short-term interval follow-up suggested:
<2% risk of malignancy; should only be used on diagnostic studies, not straight off of a screening abnormality. Usually performed at 6-month intervals.


BIRADS 4: Suspicious finding, intervention suggested (i.e., biopsy)

4a: Low suspicion for malignancy, still requiring intervention (e.g., probable fibroadenoma, but biopsy suggested)

4b: Intermediate suspicion for malignancy

4c: Moderate concern, but not classic for malignancy

BIRADS 5: Highly suggestive of malignancy. Appropriate action should be taken: Almost certainly malignant; >95% risk of malignancy.


BIRADS 6: Known biopsy-proven malignancy. Appropriate action should be taken: For biopsy-proven lesions prior to definitive therapy; often used for monitoring patients on neoadjuvant chemotherapy or for second opinions.