MIKE DEVLIN / SCIENCE PHOTO LIBRARY MIKE DEVLIN / SCIENCE PHOTO LIBRARY
Rheumatoid arthritis affecting the right hand of a 35 year old man. The hand has been left deformed by the disease. Rheumatoid arthritis is an autoimmune disease that attacks the joints. Chronic inflammation leads to the destruction of the cartilage, bone and ligaments, which causes the joints to deform.
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