Grade | Description |
---|---|
Grade 0 | normal cartilage |
Grade 1 | signal intensity alterations with an intact surface of the articular cartilage compared with the surrounding normal cartilage |
Grade 2 | partial-thickness defect of the cartilage |
Grade 3 | fissuring of the cartilage to the level of the subchondral bone |
Grade 4 | exposed subchondral bone |