Table 1 The Kellgren-Lawrence radiographic osteoarthritis grading scale
From: Infrapatellar fat pad area on knee MRI: does it correlate with the extent of knee osteoarthritis?
| Kellgren-Lawrence osteoarthritis grading scale | Description |
|---|---|
| Mild OA | -Definite osteophites and possible narrowing of the joint space |
| Moderate OA | -Moderate multiple osteophites, definite joint space narrowing, and subchondral sclerosis |
| Severe OA | -Large osteophites, marked joint space narrowing, severe sclerosis, and bone deformity |