RadEssentialReading-room reference
Kellgren–Lawrence osteoarthritis
Radiographic grading of osteoarthritis, most used at the knee. Grade ≥2 is the conventional threshold for definite OA.
| Grade | Findings |
|---|---|
| 0 | No radiographic features of OA |
| 1 | Doubtful joint space narrowing, possible osteophytic lipping |
| 2 | Definite osteophytes, possible joint space narrowing |
| 3 | Moderate multiple osteophytes, definite joint space narrowing, some sclerosis, possible bone-end deformity |
| 4 | Large osteophytes, marked joint space narrowing, severe sclerosis, definite bone-end deformity |
Sources
- Kellgren JH, Lawrence JS. Radiological assessment of osteo-arthrosis. Ann Rheum Dis. 1957;16:494–502.PubMed ↗
Radessential summarizes published classification systems for practicing radiologists. Summaries are condensed; confirm details against the cited source before relying on them for patient care.