Rheumatoid arthritis (RA) is a chronic and debilitating autoimmune disease of unknown etiology, characterized by chronic inflammation in joints with subsequent destruction of cartilages and bones.

• 摘要类风湿性关节炎是-种自身抗原未明的慢性自身免疫病，以多关节的慢性炎症及渐进性骨和软骨的破坏为主要特征。