Table 2.
Ultrasound characteristics of lymph nodes and their diagnostic performance
| US criteria | Benign LNs (n=33) | Malignant LNs (n=17) | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Accuracy (%) |
|---|---|---|---|---|---|---|---|
| S/L ratio | |||||||
| ≤0.5 | 15 (45.4) | 5 (29.4) | 70.5 | 45.4 | 40 | 75 | 54 |
| >0.5 | 18 (54.6) | 12 (70.6) | |||||
| Hilum | |||||||
| Present | 22 (66.7) | 0 | 100 | 66.6 | 60 | 100 | 78 |
| Absent | 11 (33.3) | 17 (100) | |||||
| Borders | |||||||
| Regular | 27 (81.8) | 4 (23.5) | 68.4 | 87.1 | 76.4 | 81.8 | 80 |
| Irregular | 6 (18.2) | 13 (76.5) | |||||
| Echogenicity | |||||||
| Homogeneous | 16 (48.5) | 7 (41.2) | 41.1 | 51.5 | 30.4 | 62.9 | 48 |
| Heterogeneous | 17 (51.5) | 10 (58.8) | |||||
| Color Doppler | |||||||
| Hilar | 24 (72.8) | 6 (35.3) | 64.7 | 72.7 | 55 | 80 | 70 |
| Nonhilar | 9 (27.2) | 11 (64.7) |
US: Ultrasound, LNs: Lymph nodes, S/L ratio: Ratio of short-axis diameter to long-axis diameter, PPV: Positive predictive value, NPV: Negative predictive value