Table 2.
Gray scale ultrasound features of thyroid nodules
| Grayscale features | No. of malignant nodules (n = 275) | No. of benign nodules (n = 1383) | Malignant rate | Benign rate |
|---|---|---|---|---|
| Composition | ||||
| Solid | 255 | 805 | 0.614 | 0.386 |
| Mixed | 20 | 578 | 0.148 | 0.852 |
| Cystic | ||||
| Margin | ||||
| Ill-defined | 68 | 1262 | 0.213 | 0.787 |
| Microlobulated | 115 | 106 | 0.845 | 0.155 |
| Shape | ||||
| Irregular | 92 | 15 | 0.968 | 0.032 |
| Calcification | ||||
| Micro-calcification | 111 | 51 | 0.916 | 0.084 |
| Macro-calcification | 67 | 179 | 0.653 | 0.347 |
| No-calcification | 97 | 1153 | 0.297 | 0.703 |
| Taller than wide | ||||
| <= 1 | 134 | 1326 | 0.337 | 0.663 |
| > 1 | 141 | 57 | 0.926 | 0.074 |