Table 2.
Distribution of malignant and benign thyroid nodules for all tested variants of Thyroid Imaging Reporting and Data Systems (TIRADS) classifications.
| Malignant Thyroid Nodules (n = 76, %) | Benign Thyroid Nodules (n = 69, %) | Prevalence of Malignancy (%) | |
|---|---|---|---|
| Kwak-TIRADS | |||
| 3 n (%) | 0 (0) | 9 (13.1) | 0 |
| 4A n (%) | 0 (0) | 19 (27.5) | 0 |
| 4B n (%) | 2 (2.6) | 10 (14.5) | 16.7 |
| 4C n (%) | 57 (75.0) | 27 (39.1) | 67.9 |
| 5 n (%) | 17 (22.3) | 4 (5.8) | 81.0 |
| ACR TI-RADS | |||
| TR1 n (%) | 0 (0) | 4 (5.8) | 0 |
| TR2 n (%) | 0 (0) | 8 (11.6) | 0 |
| TR3 n (%) | 0 (0) | 16 (23.2) | 0 |
| TR4 n (%) | 23 (30.3) | 18 (26.1) | 56.1 |
| TR5 n (%) | 53 (69.7) | 23 (33.3) | 69.7 |
| EU-TIRADS | 0 (0) | ||
| 2 n (%) | 0(0) | 0 (0) | 0 |
| 3 n (%) | 1 (1.3) | 23 (33.3) | 4.2 |
| 4 n (%) | 1 (1.3) | 11 (15.9) | 8.3 |
| 5 n (%) | 74 (97.4) | 35 (50.7) | 67.9 |