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Rheumatoid Arthritis (RA)%u2022Chronic autoimmune disorder primarily affecting synovial jointsDefinition:%u2022Rheumatoid factor (RF)%u2022Anti-citrullinated protein antibodies (ACPA)Key autoantibodies:%u2022Symmetric polyarthritis%u2022Morning stiffness%u2022Joint deformities%u2022Extra-articular manifestationsClinical features:%u2022RF, ACPA, ESR, CRP, X-raysInvestigations:%u2022DMARDs, biologics, NSAIDs, corticosteroidsTreatment:
