Table 3 SE and CEUS characteristics of patients with benign and malignant parotid tumors (n=115).
| Features | Benign (n=72) | Malignant (n=43) | P-value |
| SE: strain elastography; CEUS: contrast-enhanced ultrasound | |||
| Elasticity score >3 ≤3 |
7 65 |
26 17 |
<0.001 |
| Enhancement intensity Low or equal High |
20 52 |
15 28 |
0.423 |
| Margin enhancement Clear Unclear |
51 21 |
8 35 |
<0.001 |
| Ring enhancement Absent Present |
59 13 |
42 1 |
0.013 |
| Size enhancement Larger Similar |
5 67 |
20 23 |
<0.001 |
| Enhancement texture Homogeneous Heterogeneous |
34 38 |
14 29 |
0.123 |
| Echo-free area Absent Present |
50 22 |
28 15 |
0.631 |
| Enhancement mode Fast-in and fast-out Fast-in and slow-out Slow-in and fast-out Slow-in and slow-out |
10 25 23 12 |
25 6 7 4 |
<0.001 |