TOPICS: Wear and tear, metalloproteinase, collagen, proteoglycans, joint stiffness, crepitus, asymmetric involvement, groin pain, disc disease, heberden nodes, bouchard nodes, bow legged, joint space narrowing, osteophytes, rheumatoid arthritis, extra-articular, pannus, granulation tissue, synovial hyperplasia, synovial angiogenesis, ankylosis, HLA-DR4, symmetric involvement, swan neck deformity, boutonniere deformity, subluxation of atlantooccipital joint, pleuritis, effusions, rheumatoid nodules, fibrinous pericarditis, baker cyst, anemia of chronic disease, sjogren syndrome, rheumatoid factor, anti-cyclic citrullinated peptide antibody, ANA
