All are X-ray findings of RA except:

Radiological features of RA are Evidence of soft tissue swelling and joint effusion Symmetrical involvement Juxta-aicular osteopenia (within weeks) Loss of aicular cailage and bone erosions (after months) Narrowing of joint space Aicular destruction and joint deformity, e.g. subluxation of atlantoaxial and cervical joints Lack of hyperophic bone changes (sclerosis or osteophyte)