Table 2 Comparison of malignancy risk between the various guidelines
Benign nodules | Malignant nodules | Reported malignant rate (%) | Actual malignant rate (%) | |
|---|---|---|---|---|
ACR-TI-RADS | ||||
1 | 14 | 1 | ≤ 2 | 6.67 |
2 | 52 | 0 | ≤ 2 | 0 |
3 | 40 | 3 | < 5 | 6.98 |
4 | 73 | 86 | 5—20 | 54.09 |
5 | 51 | 429 | > 20 | 89.38 |
C-TI-RADS | ||||
2 | 10 | 0 | 0 | 0 |
3 | 80 | 1 | < 2 | 1.23 |
4A | 59 | 26 | 2—10 | 30.59 |
4B | 50 | 130 | 10—50 | 72.22 |
4C | 31 | 351 | 50—90 | 91.88 |
5 | 0 | 11 | > 90 | 100 |