Rheumatoid arthritis is a chronic inflammatory disease that primarily affects the joints and surrounding tissues.
Update Date 11/9/2014
Updated by: Jennifer K. Mannheim, ARNP, Medical Staff, Department of Psychiatry and Behavioral Health, Seattle Children's Hospital, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.