The hallmark diagnostic imaging feature of the rheumatoid hand is , which typically occur at the "bare areas" of the joint where the synovium directly overlies the bone without cartilage protection.
Hand and Wrist Rheumatoid Arthritis - StatPearls - NCBI Bookshelf
: Early thinning of the bone near affected joints.
: Symmetrical loss of cartilage, most frequently in the MCP (knuckle), PIP (middle finger), and carpal (wrist) joints.
: Late-stage structural changes like ulnar deviation (fingers drifting toward the pinky side), boutonnière deformity , and swan-neck deformity . Magnetic Resonance Imaging (MRI)
