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 |