Kellgren–Lawrence grading scale
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The Kellgren–Lawrence grade (or K-L system) is a scoring tool used to assess the severity of knee osteoarthritis on a plain radiograph.[1] It was first proposed in 1957 by Drs. J.H. Kellgren and J.S. Lawrence.[2]
Scale
| Grade | Description |
|---|---|
| 0 | No radiographic features of osteoarthritis |
| 1 | Possible joint space narrowing and osteophyte formation |
| 2 | Definite osteophyte formation with possible joint space narrowing |
| 3 | Multiple osteophytes, definite joint space narrowing, sclerosis and possible bony deformity |
| 4 | Large osteophytes, marked joint space narrowing, severe sclerosis and definite bony deformity |
References
See also
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