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Papules, Scales, Plaques and Eruptions

Picture of Psoriatic Arthritis

Picture of Psoriatic Arthritis

Psoriatic arthritis is a type of arthritis that affects both the joints and the skin. It is an autoimmune disease. The immune system creates antibodies that attack certain tissues in the body. Some cases of psoriatic arthritis occur without accompanying skin psoriasis. Arthritis may develop many months or years before or after psoriasis is present.

Image Source: Image courtesy of Hon Pak, M.D. and reprinted with permission from eMedicine.com, 2009

Text Reference: American College of Rheumatology: "Psoriatic Arthritis"