Immunopathogenesis of the joint changes

Describe the immunopathogenesis of the joint changes that occur in Rheumatoid arthritis. A 30 year old woman recently diagnosed with rheumatoid arthritis (RA), complains of general fatigue and weight loss along with symmetric joint welling, stiffness, and pain. The stiffness is more prominent in the morning and subsides during the day. Laboratory measures reveal an RF of 120 IU/ml (nonreactive, 0 to39 IU/mL; weakly reactive, 40 to 79 IU/ml; reactive, > 80 IU/ml).