BI-RADS stands for Breast Imaging Reporting and Database System, a scoring system used to explain mammogram results. While a mammogram can’t confirm a breast cancer diagnosis, it can help to identify abnormalities. The categories in a BI-RADS score run from 0 to 6. A score ranging from 0 to 2 is the most common result in women aged 40 and above and indicates normal results or that any abnormal results are benign. With a score of 3 or above, a follow-up visit or biopsy is recommended to determine the next steps. Category 0 - indicates an inadequate test; the images may have been difficult to read or interpret. A BI-RADS score of 0 will require additional tests and images to provide a final assessment. Category 1 - confirms that the mammogram results are negative. There is no cancer and the breasts are of equal density. Regular screenings should still be done. Category 2 - also shows a normal result. There are no indications of cancer, but benign cysts or masses may have been detected and noted in the report. The note will be used as a comparison for any future results. Routine visits are still suggested with this score. Category 3 - implies that the mammogram results may be normal, but there’s a very low (2%) risk of cancer. A follow-up visit will be recommended within six months together with regular visits until the results improve and any irregularities have stabilized. Regular visits will help to avoid multiple and unnecessary biopsies and also help to detect the early stages of cancer. Category 4 - indicates a suspicious finding or abnormality with a 20-35% chance of cancer. A biopsy will be performed to test a small tissue sample. This category is further split into three levels: • 4A. Low suspicion for cancer or malignancy. • 4B. Moderate suspicion for cancer or malignancy. • 4C. High suspicion of cancer or malignancy. Category 5 - indicates that there’s at least a 95% chance of breast cancer. A biopsy is highly recommended to confirm the results. Category 6 – this score is only used once a biopsy has confirmed the presence of cancer.