Detection of Nodal Metastases per Level by CECT Parameters
| CECT feature | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Accuracy (%) |
|---|---|---|---|---|---|
| Size (enlarged) | 63 | 89 | 66 | 88 | 79 |
| Shape (round) | 83 | 66 | 45 | 92 | 73 |
| Contrast enhancement (any) | 83 | 68 | 47 | 92 | 74 |
| Heterogeneous enhancement | 63 | 96 | 84 | 89 | 83 |
| Absence of fatty hilum | 97 | 21 | 29 | 95 | 51 |
| Necrosis | 53 | 98 | 90 | 86 | 81 |
| Extracapsular spread | 43 | 98 | 88 | 84 | 77 |
| Asymmetry | 100 | 21 | 30 | 100 | 52 |
| Overall CT appearance | 57 | 88 | 63 | 86 | 81 |
Total number of nodal levels evaluated by CECT alone was 77. Prevalence of malignant nodal levels was 25.27%. PPV = positive predictive value; NPV = negative predictive value.