Table I.
Demographic and nodule characteristics.
| Histological diagnosis | ||
|---|---|---|
| Benign group (n=16) | Malignant group (n=82) | |
| Patient information | ||
| Age (years) | 48.00±6.07 | 45.95±3.20 |
| Sex ratio (M/F) | 6/10 | 25/57 |
| Nodule characteristic | ||
| Unique/multinodular | 16/0 | 73/9 |
| Maximun size | ||
| (mm; mean ± SD) | 7.3±6.1 | 13.7±11.6 |
| Echo genicity | ||
| Hypoechoic | 8 | 39 |
| Isoechoic | 3 | 12 |
| Hyperechoic | 2 | 10 |
| Unknown | 3 | 21 |
| Blood flow | ||
| Rich | 9 | 35 |
| Normal | 1 | 0 |
| Low | 4 | 22 |
| Unknown | 2 | 25 |
| Microcalcification | ||
| Positive | 9 | 38 |
| Negative | 5 | 15 |
| Unknown | 2 | 29 |
| Aspect ratio | ||
| <1 | 11 | 46 |
| >1 | 4 | 5 |
| Unknown | 1 | 24 |
| Boundary | ||
| Clear | 7 | 33 |
| Unclear | 6 | 18 |
| Unknown | 3 | 31 |
| TI-RADS category 4 | 15/16 | 63/82 |
| Pathological subtype | ||
| PTC | – | 52 |
| ATC | – | 13 |
| MTC | – | 10 |
| FTC | – | 7 |
| Lymph node metastasis | ||
| Positive | – | 27 |
| Negative | – | 55 |
SD, standard deviation; TI-RADS, Thyroid Imaging Reporting and Data System; PTC, papillary thyroid cancer; ATC, anaplastic thyroid cancer; MTC, medullary thyroid cancer; FTC, follicular thyroid cancer.