Table 3. American College of Radiology Thyroid Imaging, Reporting and Data System (ACR TI-RADS) (11).
| ACR TI-RADS designation | Risk of malignancy |
|---|---|
| TR1 | ≤2% |
| TR2 | ≤2% |
| TR3 | 2.1–5.0% |
| TR4 | 5.1–20% |
| TR5 | >20% |
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