Table 1

Scoring key for murine knees

Score

Edge

Proteoglycans

Open lacuna

Non-calcified layer

Synovial lining

Blood in cavity

Pannus tongues

0

Smooth

> 90% present

None

> 90% present

1 even

Absent

Absent

1

Rough

> 50% present

Some

> 50% present

< 50% 2 layers

Present

Present

2

< 50% present

Many

< 50% present

> 50% 2 layers

3

< 10% present

< 10% present

2 layers

4

> 2 layers

Milici et al. Arthritis Research & Therapy 2008 10:R14   doi:10.1186/ar2365