Table 2 MRI diagnosis of the synovial lesions compared to arthroscope and their concordance
MRI diagnosis | Arthroscopy | Total | |
|---|---|---|---|
1. Synovial chondromatosis | 15 | 14 | 14 (43.8%) |
2. PVNS | 10 | 10 | 10 (31.3%) |
3. Lipoma arborescence | 5 | 5 | 5 (15.6%) |
4. Synovial chondrosarcoma | – | 1 | 1 (3.1%) |
5.Synovial hematoma | 1 | 1 | 1(3.1%) |
6. Ganglion cyst | 1 | 1 | 1(3.1%) |
Total | 32 | 32 | 32 |
Concordance of MRI and arthroscopy | |||
Accuracy | 96.9% | ||
Sensitivity | 91.7% | ||
Specificity | 99% | ||
PPV | 52.3% | ||
NPV | 99.9% | ||