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The Kellgren Lawrence Scale
| Description | Grading |
|---|---|
| Normal | 0 |
| Doubtful narrowing of joint space and possible osteophytic lipping. | 1 |
| Definite osteophytes and possible narrowing of joint space. | 2 |
| Moderate multiple osteophytes, definite joint-space narrowing, some sclerosis and possible deformity of bony ends. | 3 |
| Large osteophytes, marked joint-space narrowing, severe sclerosis and definite deformity of bony ends. | 4 |
