Which one of the following is a recognized X-ray feature of rheumatoid arthritis?
Radiological findings of RA:- Periarticular soft tissue swelling, periarticular osteopenia, Marginal erosion, subchondral cysts, widening of joint space (early), narrowing of joint space (later), ankylosis, subluxation or dislocation, and arthritis mutilans (late in the disease).
Juxta-articular osteosclerosis
Sacroilitis
Bone erosions
Peri-articular calcification