| Synovial lining cell hyperplasia |
| |
|
| 1 - 2 layers of cells | 0 |
|
| More than 3 layers | 1 |
| Vascular changes |
| |
|
| None | 0 |
|
| Edema and vascular congestion | 1 |
|
| Vascular proliferation | 2 |
| Villous hyperplasia |
| |
|
| Smooth surface | 0 |
|
| Irregular | 1 |
|
| Partially fingerlike hyperplasia | 2 |
|
| Diffuse fingerlike hyperplasia | 3 |
| Cellular infiltration |
| |
|
| None | 0 |
|
| Scattered cells | 1 |
|
| Moderate; cell cluster | 2 |
|
| Perivascular cell aggregation | 3 |
|
| Marked cellular infiltration with lymphoid follicle | 4 |
| Total score | 10 | |