All are features of Rheumatoid - arthritis, EXCEPT-
High-Yield Explanation
Radiological features of RA
Following features are seen on X-ray :-
Reduced joint space
Erosion of articular margins
Subchondral cysts
Juxta-articular rarefaction
Soft tissue shadow at the level of the joint because of joint effusion or synovial hypertrophy
Deformities of the hand and fingers
Periarticular osteopenia (osteoporosis)