Classification of breast birads

The Breast Imaging Reporting and Information System (BI-RADS), created and recommended by the American Association of Radiology (ACR) in 1992, standardized the terminology of X-ray image reporting. In 2003, it added the content of ultrasound and MRI to facilitate comparison among various imaging diagnostic centers. Now more and more hospitals use BI-RADS for evaluation and grading in breast mammography, ultrasound diagnosis and MRI reporting.

Its practical significance is as follows:

Level 0: Recall is required and further assessment will be made after other tests are conducted, indicating that the information obtained from the tests may not be complete enough.

Level 1: No abnormalities found inside.

Level 2: Considering the good changes, regular follow-up is recommended (e.g. once a year).

Grade 3: Good symptoms are possible, but the follow-up period needs to be reduced (e.g., once every 3 to 6 months). The proportion of malignant changes at this grade is less than 2%.

Level 4: Considering the possibility of malignant transformation, a puncture biopsy is required to confirm it.

Grade 4A: 3-8% possibility of malignancy, follow-up for 6 months after obtaining good cytological or histological examination results.

Grade 4B: Moderate level of pseudo-malignant disease, 9-49% possibility of malignancy.

Grade 4C: 50-94% chance of malignant transformation, but does not yet have the typical malignant characteristics of grade 5.

Level 5: Highly suspected of malignant disease (basically assessed as malignant disease), requiring surgical removal and biopsy.

Grade 6: The disease has been confirmed as a malignant change by pathology.

At present, the diagnosis and treatment procedures of breast diseases in various hospitals are relatively standardized, and there are many breast imaging diagnostic examination methods. The application of this reporting system is committed to using a standardized and unified "language" to conduct effective "communication" between different courses, facilitating clinicians to conduct comprehensive judgment. Of course, the extent of breast disease cannot be determined solely from imaging diagnosis. Clinicians are also required to make a comprehensive analysis based on medical history, clinical symptoms and other conditions to make further diagnosis and treatment recommendations.