Table 1: Breast imaging reporting and data system (BIRADS) classification.

Category Description
0 (Incomplete) Additional imaging evaluation needed before final assessment
I (Negative) No lesion found (routine follow-up)
II (Benign finding) No malignant feaswtures; e.g. cyst (routine follow-up for age, clinical management)
III (Probably benign finding) Malignancy is highly unlikely, e.g. fibroadenoma (initial short interval follow-up)
IV (Suspicious abnormality) Low to moderate probability of cancer, biopsy should be considered
V (Highly suggestive of malignancy) Almost certainly cancer, appropriate action should be taken