Table 2.
Diagnostic efficacy of MRI and 18F-FDG PET/CT in finding the malignancy in all patients
| Feature | Group
|
Sensitivity (%) | Specificity (%) | PPV | NPV | |
|---|---|---|---|---|---|---|
| Malignant fracture | Benign fracture | |||||
| Epidural mass formation | 34/41 | 14/75 | 82.9 | 81.3 | 70.8 | 89.7 |
| Convex posterior cortex | 31/41 | 17/75 | 75.6 | 77.3 | 64.6 | 85.3 |
| Pedicle enhancement | 30/35 | 14/48 | 85.7 | 70.8 | 68.2 | 87.2 |
| All three features | 19/35 | 3/48 | 54.2 | 93.8 | 86.4 | 73.8 |
| 18F-FDG PET/CT | 41/41 | 11/18 | 100.0 | 38.9 | 90.1 | 100.0 |
Notes: Values represent number of lesions showing the specified feature/number of lesions evaluated. Group assignment was based on final diagnosis as determined by biopsy or clinical follow-up.
Abbreviations: PPV, positive predictive value; NPV, negative predictive value; 18F-FDG, 2-[fluorine-18]-fluoro-2-deoxy-D-glucose; PET, positron emission tomography; CT, computed tomography.