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 |