CID - ISM / SCIENCE PHOTO LIBRARY CID - ISM / SCIENCE PHOTO LIBRARY
Psoriatic arthritis. Close-up of the hand of 70-year-old male patient affected by psoriatic arthritis. Psoriatic arthritis is a painful condition that causes inflamed stiff joints in a small minority of patients with psoriasis, a chronic autoimmune disease in which itchy, scaly red patches develop on the skin.
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