BiRADS

The BI-RADS classification system standardises breast imaging reporting. Category 0 means incomplete assessment, 1 is normal, 2 is benign, 3 is probably benign (short-interval follow-up), 4 is suspicious (biopsy needed), 5 is highly suggestive of malignancy (staging and treatment), and 6 is a known biopsy-proven cancer. This guides management directly — anything category 4 or above needs tissue diagnosis.