Parameter | Feature | Grade |
---|---|---|
Safranin O staining | Normal or nearly normal | 3 |
Moderate | 2 | |
Slight | 1 | |
None | 0 | |
Surface regularity | Smooth and intact | 3 |
Superficial horizontal lamination | 2 | |
Fissures 25–100 % of the thickness | 1 | |
Severe disruption, including fibrillation | 0 | |
Cellularity | Normal cellularity | 3 |
Slight hypocellularity | 2 | |
Moderate hypocellularity | 1 | |
Severe hypocellularity | 0 | |
Chondrocyte clustering | No clusters | 2 |
<25Â % of the cells | 1 | |
25–100 % of the cells | 0 |