Rheumatoid arthritis is a chronic inflammatory disease that primarily affects the joints and surrounding tissues.
Update Date 11/9/2012
Updated by: Jennifer K. Mannheim, ARNP, Medical Staff, Department of Psychiatry and Behavioral Health, Seattle Children's Hospital. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, Stephanie Slon, and Nissi Wang.