Breast Imaging-Reporting and Data System Assessment Category 4

**Semantic type:** Classification

**Definition:** An assessment category of the American College of Radiology Breast Imaging-Reporting and Data System (BI-RADS) that indicates that the findings of a breast imaging study are suspicious for malignancy, with a 2-95% probability of malignancy.

**Synonyms:** - BI-RADS 4