Table 2. Comparison of CEUS characteristics between effective group and ineffective group.
| Features | Effective group (n=7) | Ineffective group (n=21) | P |
|---|---|---|---|
| Texture of enhancement | 1.000 | ||
| Homogeneous | 1 | 2 | |
| Heterogeneous | 6 | 19 | |
| Equal or low enhanced area inside | 0.545 | ||
| Yes | 0 | 4 | |
| No | 7 | 17 | |
| Boundary | 0.385 | ||
| Clear | 2 | 12 | |
| Unclear | 5 | 9 | |
| Shape | 1.000 | ||
| Regular | 2 | 6 | |
| Irregular | 5 | 15 | |
| Solar sign | 1.000 | ||
| Yes | 4 | 10 | |
| No | 3 | 11 | |
| Invasion of skin | 1.000 | ||
| Yes | 2 | 5 | |
| No | 5 | 16 | |
| Invasion of muscle | 0.674 | ||
| Yes | 3 | 7 | |
| No | 4 | 14 | |
| Invasion of nipples | 1.000 | ||
| Yes | 1 | 4 | |
| No | 6 | 17 | |
| The largest cross section of the lesions in CEUS (cm) | |||
| TD | 4.11±1.90 | 4.34±1.89 | 0.780 |
| APD | 2.13±0.78 | 2.75±1.05 | 0.168 |
| Maximum area in CEUS (cm2) | 6.46±4.29 | 7.49±3.86 | 0.557 |
| Maximum circumference in CEUS (cm) | 11.98±5.54 | 12.26±4.80 | 0.898 |
CEUS, contrast-enhanced ultrasonography; TD, transverse diameter (cm); APD, anteroposterior diameter (cm).