Table 3.
Comparison of PET imaging parameters and FDG uptake pattern in distinguishing between LMS/STUMP and benign leiomyomas.
| TP | TN | FP | FN | N/A | Accuracy (%) | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | |
|---|---|---|---|---|---|---|---|---|---|---|
| SUVmax | 6 | 10 | 3 | 2 | 0 | 76∗ | 75 | 77 | 67 | 83 |
| Metabolic tumor/necrosis ratio | 6 | 8 | 0 | 0 | 7 | 100 | 100 | 100 | 100 | 100 |
| “Hollow ball” sign | 8 | 13 | 0 | 0 | 0 | 100 | 100 | 100 | 100 | 100 |
∗ P=0.063, McNemar's test versus “hollow-ball” sign; LMS, leiomyosarcoma; STUMP, smooth muscle tumor with uncertain malignant potential; TP, true-positive; TN, true-negative; FP, false-positive; FN, false-negative; N/A, not available; PPV, positive predictive value; NPV, negative predictive value.