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Malignancy risk according to category in the modified version of the TI-RADS.
| Modified TI-RADS category | n | Malignant risk(%) | Calculated malignancy risk(%) | Frequency(%) |
|---|---|---|---|---|
| TI-RADS2 | 159 | 0 | 0(0/159) | 3.5(159/4532) |
| TI-RADS3 | 1256 | <5 | 4.1(52/1256) | 27.7(1256/4532) |
| TI-RADS4a | 649 | 5-15 | 12.0(78/649) | 14.3(649/4532) |
| TI-RADS4b | 1323 | 15-90 | 86.0(1138/1323) | 29.2(1323/4532) |
| TI-RADS5 | 1145 | >90 | 95.4(1092/1145) | 25.3(1145/4532) |
