Table I.
Characteristics of conventional ultrasound of benign and malignant thyroid nodules.
| Characteristic | Malignant (n=66) | Benign (n=43) | χ2 | P-value |
|---|---|---|---|---|
| Shape | 0.952 | 0.329 | ||
| Regular | 29 | 23 | ||
| Irregular | 37 | 20 | ||
| Aspect ratio | 10.200 | 0.001 | ||
| <1 | 32 | 34 | ||
| ≥1 | 34 | 9 | ||
| Margin | 77.840 | <0.001 | ||
| Well-defined, smooth | 9 | 43 | ||
| Poorly-defined | 57 | 0 | ||
| Echogenicity | 21.010 | <0.001 | ||
| Hyperechogenicity | 17 | 30 | ||
| Isoechogenicity | 24 | 8 | ||
| Hypoechogenicity | 25 | 5 | ||
| Echotexture | 0.333 | 0.564 | ||
| Homogeneous | 27 | 20 | ||
| Heterogeneous | 39 | 23 | ||
| Calcification | 20.560 | <0.001 | ||
| Microcalcification | 49 | 13 | ||
| Macrocalcification | 17 | 30 |