Rheumatoid Arthritis

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Risk Factors and Causes

The cause for RA is unknown; however, the immune system plays a very important role in disease development. Rheumatoid arthritis occurs as a result of an abnormal immune system response, but the cause for this abnormal response has not been identified.


Approximately 50–95% of patients who have RA also have high levels of an antibody called rheumatoid factor, which may indicate an immune system abnormality. An antibody is a protein that is produced in response...Read the full article