| Benign | Malignant | P value |
---|---|---|---|
Irregular shape | 10.7% | 42.7% | < 0.001 |
Ill-defined margin | 9.7% | 38.7% | < 0.001 |
Solid structure | 41.3% | 75.8% | < 0.001 |
Hypoechogenicity | 27.1% | 68.5% | < 0.01 |
Microcalcification | 13.0% | 48.5% | < 0.001 |
Macrocalcification | 12.5% | 18.5% | 0.001 |
Egg-shell calcification | 1.6% | 1.7% | 0.797 |
Central flow | 47.1% | 60.3% | < 0.001 |