Psoriatic arthritis is a type of arthritis that occurs in 5% to 30% of people who have psoriasis of the skin. Note the psoriasis plaques on the knuckles and the swelling and redness of the DIP joints (the joints closest to the nail).
Psoriatic Arthritis
By Heather Brannon, MD, About.com Guide
Updated January 24, 2010
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
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