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Characteristics of 253 cases (319 thyroid nodules) diagnosed by conventional ultrasonography.
| Shape | Solidity | Aspect ratio | |||||
|---|---|---|---|---|---|---|---|
| Group | Nodule no. | Regular | Irregular | Solid | Cystic-solid | ≥1 | <1 |
| Benign | 183 | 161 | 22 | 157 | 26 | 14 | 169 |
| Malignant | 136 | 37 | 99 | 103 | 33 | 121 | 15 |
| χ2 | 40.31 | 5.22 | 211.36 | ||||
| P-value | 0.000 | 0.025 | 0.000 | ||||
Two-dimensional ultrasound revealed statistically significant differences (P<0.05) between benign and malignant thyroid nodules regarding shape, solidity and aspect ratio.
