Table 2.

Histologic scoring system for 6 features

Feature, Score
Polymorphonuclear cell infiltration
0 = none
1 = scanty
2 = focal clusters
3 = widespread
Hyperemia
0 = no vessels dilated/congested
1 = occasional
2 = intermediate
3 = all vessels affected
Fibrin deposition
0 = none
1 = scanty and focal
2 = focal with polymorphonuclear cells
3 = extensive
Mononuclear cell infiltration
0 = occasional
1 = focal
2 = confluent
3 = confluent with follicles
Synovial cell proliferation
0 = 2–3 cell layers
1 = 4–5 cell layers
2 = 6–7 cell layers
3 = >7 cell layers
Fibrosis
0 = scant perivascular
1 = discreet isolated bands
2 = broad bands
3 = confluemt