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modified International Cartilage Repair Society (ICRS) score scale
| Modified International Cartilage Repair Society (ICRS) score | |
|---|---|
| Grade 0 | Normal cartilage |
| Grade 1 | Focal blistering and intra-cartilaginous low- signal intensity area with an intact surface and bottom |
| Grade 2 | Irregularities on the surface or bottom and loss of thickness of less than 50% |
| Grade 3 | Deep ulceration with loss of thickness of more than 50% |
| Grade 4 | Full-thickness cartilage wear with exposure of subchondral bone |
