Table 5. Correlation analysis between CEUS characteristics and pathological grading.
| Characteristics | Pathological grading after NAC (n=22) | Contingency coefficient |
P | ||||
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | |||
| Texture of enhancement | 0.363 | 0.550 | |||||
| Homogeneous | 0 | 0 | 1 | 1 | 0 | ||
| Heterogeneous | 1 | 6 | 7 | 2 | 4 | ||
| Equal or low enhanced area inside | 0.495 | 0.126 | |||||
| Yes | 1 | 2 | 1 | 0 | 0 | ||
| No | 0 | 4 | 7 | 3 | 4 | ||
| Boundary | 0.497 | 0.115 | |||||
| Clear | 1 | 3 | 6 | 2 | 0 | ||
| Unclear | 0 | 3 | 2 | 1 | 4 | ||
| Shape | 0.398 | 0.475 | |||||
| Regular | 0 | 2 | 3 | 2 | 0 | ||
| Irregular | 1 | 4 | 5 | 1 | 4 | ||
| Solar sign | 0.564 | 0.020* | |||||
| Yes | 0 | 1 | 4 | 0 | 4 | ||
| No | 1 | 5 | 4 | 3 | 0 | ||
| Invasion of skin | 0.228 | 0.932 | |||||
| Yes | 0 | 1 | 3 | 1 | 1 | ||
| No | 1 | 5 | 5 | 2 | 3 | ||
| Invasion of muscle | 0.322 | 0.777 | |||||
| Yes | 0 | 1 | 4 | 1 | 2 | ||
| No | 1 | 5 | 4 | 2 | 2 | ||
| Invasion of nipples | 0.335 | 0.706 | |||||
| Yes | 0 | 1 | 3 | 1 | 0 | ||
| No | 1 | 5 | 5 | 2 | 4 | ||
| The largest cross section of the lesions in CEUS (cm) | |||||||
| TD | 3.93 | 3.94±0.96 | 4.5±1.86 | 4.59±2.52 | 3.75±1.61 | −0.056 | 0.805 |
| APD | 2.6 | 2.52±0.60 | 2.8±0.78 | 2.04±0.42 | 2.2±1.04 | −0.208 | 0.353 |
| Maximum area in CEUS (cm2) | 9 | 6.15±2.32 | 8.89±4.36 | 6.21±4.15 | 6.65±5.02 | −0.053 | 0.813 |
| Maximum circumference in CEUS (cm) | 11.3 | 10.76±1.83 | 13.03±5.66 | 12.41±6.29 | 11.66±5.89 | 0.042 | 0.854 |
CEUS, contrast-enhanced ultrasonography; NAC, neoadjuvant chemotherapy; TD, transverse diameter (cm); APD, anteroposterior diameter (cm).