Table 2.
Ultrasound image features of all lymph nodes.
| Characteristics | Overall (n = 1082) |
|---|---|
| Long-axis (median [IQR]) | 2.00 [1.50, 2.77] |
| Short-axis | |
| >1 cm | 882 (81.5%) |
| ≤1 cm | 200 (18.5%) |
| Long-axis/short-axis ratio | |
| ≥1.5 | 229 (21.2%) |
| <1.5 | 853 (78.8%) |
| Number of passes per node (median [IQR]) | 3.0 [2.0, 3.0] |
| Echo intensity | |
| Hyperechoic | 32 (3.0%) |
| Hypoechoic | 1041 (96.2%) |
| Isoechoic | 9 (0.8%) |
| Echogenicity | |
| Heterogeneous | 671 (62%) |
| Homogeneous | 411 (38%) |
| Margin | |
| Indistinct | 866 (80%) |
| Distinct | 216 (20%) |
| Blood flow | |
| Rich | 890 (82.3%) |
| Lacking | 192 (17.7%) |
| Fusion | |
| Absent | 822 (76.0%) |
| Present | 260 (24.0%) |
| Central hilar structure | |
| Absent | 740 (68.4%) |
| Present | 342 (31.6%) |