Synovitis, as assessed clinically and by magnetic resonance imaging (MRI)
| Clinical synovitis (n=125 joints) | |||
|---|---|---|---|
| − | + | ||
| MRI synovial hypertrophy (n=125 joints) | |||
| Grades 0–1 | 41 | 5 | |
| Grades 2–4 | 43 | 36 | |
Synovial hypertrophy grades were significantly higher in joints with clinical signs of synovitis (p<0.001). 51% of the joints without clinical findings of synovitis had demonstrable synovial hypertrophy—that is, the extremity MRI is more sensitive than clinical investigation.