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What is Osteoarthritis is associated with all of the following except - and explain in detail?
Radiological features of osteoarthritis 

The diagnosis of OA can be made on x-ray which shows:-

i) Narrowing of joint space → Earliest manifestation                                    
ii) Spurring' or 'lipping' of the joint from the formation of osteophytes  
iii) Loose bodies
iv) Subchondral sclerosis
v) Subchondral cyst
vi) Deformity of the joint