Table 2 Histological scoring criteria
Histological findings | Score | |
|---|---|---|
Synovial thickening | Lining cell layer 1–2 cells thick | 0 |
Lining cell layer 3–5 cells thick | 1 | |
Lining cell layer 6–8 cells thick and/ or mild increase in cellularity | 2 | |
Lining cell layer > 9 cells thick and/ or severe increase in cellularity | 3 | |
Inflammatory cell infiltration | None | 0 |
Slight | 1 | |
Moderate | 2 | |
Severe | 3 |