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Psoriatic Arthritis

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Updated January 24, 2010

Psoriatic Arthritis
Photo © A.D.A.M.
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).

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