| Cartilage Erosion Scoring Criteria |
Score |
| Smooth non-eroded cartilage |
0 |
| Rough non-eroded cartilage |
1 |
| Superficial fibrillation |
2 |
| Separation of uncalcified from calcified cartilage |
3 |
| Erosion of uncalcified cartilage only |
4 |
| Erosion extending into calcified cartilage |
5 |
| Erosion down to subchondral bone |
6 |
| Chondrocyte periphery staining |
|
| Normal |
0 |
| Slightly enhanced |
1 |
| Intensely enhanced |
2 |
| Spatial arrangement of chondrocytes |
|
| Normal |
0 |
| Diffuse hypercellularity |
1 |
| Clustering |
2 |
| Hypocellularity |
3 |
| Background staining intensity |
|
| Normal |
0 |
| Slight reduction |
1 |
| Moderate reduction |
2 |
| Severe reduction |
3 |
| No dye noted |
4 |
The Modified Mankin score is comprised of four categories: cartilage erosion
score, chondrocyte periphery staining, spatial arrangement of chondrocytes, and
background staining intensity.