Rheumatoid arthritis of the wrist joint
Wrist pain and stiffness especially in the morning.
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Wrist joint synovial hypertrophy with erosions of the distal radius and carpal bones, marrow edema of the capitate and lunate and mild joint effusion. Focal discontinuity of the triangular fibrocartilage at the ulnar side is also noted. No deformity seen.
The patient was discovered to have Rheumatoid factor positive. The hallmark of rheumatoid is the formation of pannus, which is synovial hypertrophy in response to inflammation. Later on pannus erodes the articular surface of bone and cartilage and results in arthritis and bone deformity.