Radiographic findings in osteoarthritis

1. What are the major radiographic findings in OA?
2. Are erosive changes seen on X-ray in OA?
3. Is osteopenia seen on X-ray in OA?
4. Where is joint space narrowing seen in knee and hip OA?

Answers:
1. Asymmetric narrowing of the joint space, new bone formation, osteophytes, osseous cysts, loose bodies.
2. No, this is seen in RA.
3. No, this is seen in RA.
4. Knee: medial joint space narrowing. Hip: superior lateral joint space narrowing.