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Healthy joint vs. damaged joint

Illustration copyright 2004 by Nucleus Communications, Inc. All rights reserved. http://www.nucleusinc.com

In rheumatoid arthritis, the joint lining (synovium) fills with immune cells, blood vessels, and other cells. This material grows until it erodes through the cartilage and surrounding bone as it expands. It also loosens ligaments and tendon attachments.

Primary Medical Reviewer Kathleen Romito, MD
- Family Medicine
Specialist Medical Reviewer Stanford M. Shoor, MD
- Rheumatology
Last Updated August 23, 2006

WebMD Medical Reference from Healthwise

Last Updated: August 23, 2006
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