Table 2.
The distribution of findings according to benign/malignant lymph nodes and statistical data for conventional US characteristics and VTIQ SWV for predicting malignant lymph nodes
| Variable | Benign LN (n=52), n (%) | Malignant LN (n=48), n (%) | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Accuracy (%) | P |
|---|---|---|---|---|---|---|---|---|
| Short-axis diameter | ||||||||
| <10.5 mm | 37 (71.1) | 12 (25) | 75 | 71 | 70 | 75 | 73 | 0.001 |
| ≥10.5 mm | 15 (28.8) | 36 (75) | ||||||
|
| ||||||||
| Axial ratio | ||||||||
| <0.56 | 24 (46.1) | 8 (16.6) | 83.3 | 53.8 | 62 | 77 | 68 | 0.001 |
| ≥0.56 | 28 (53.84) | 40 (83.3) | ||||||
|
| ||||||||
| Echogenic hilus | ||||||||
| Present | 30 (57.7) | 8 (16.7) | 83.3 | 57.6 | 64.5 | 78.9 | 70 | 0.001 |
| Absent | 22 (42.3) | 40 (83.3) | ||||||
|
| ||||||||
| Calcification | ||||||||
| No | 41 (78.8) | 37 (77.1) | 22.9 | 78.8 | 50 | 52.5 | 52 | 0.83 |
| Yes | 11 (21.2) | 11 (22.9) | ||||||
|
| ||||||||
| Cystic changes | ||||||||
| No | 42 (80.8) | 20 (41.7) | 58.3 | 80.7 | 73.6 | 67.7 | 70 | 0.001 |
| Yes | 10 (19.2) | 28 (58.3) | ||||||
|
| ||||||||
| Vascularity pattern | ||||||||
| Normal | 33 (63.4) | 6 (12.5) | 87.5 | 63.4 | 68.8 | 84.6 | 75 | 0.001 |
| Abnormal | 19 (36.5) | 42 (87.5) | ||||||
|
| ||||||||
| SWVmean | ||||||||
| <3.03 m/s | 33 (63.7) | 4 (8.4) | 91.6 | 63.4 | 69 | 89 | 77 | 0.001 |
| ≥3.03 m/s | 19 (36.3) | 44 (91.6) | ||||||
|
| ||||||||
| SWVmax | ||||||||
| <3.03 m/s | 31 (56.7) | 3 (6.25) | 93 | 59 | 68 | 91 | 75 | 0.001 |
| ≥3.03 m/s | 21 (40.3) | 45 (93.75) | ||||||
US, ultrasonography; VTIQ, virtual touch tissue imaging quantification; SWV, shear wave velocity; LN, lymph node; PPV, positive predictive value; NPV, negative predictive value.