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Psoriatic arthritis (PsA)

Psoriatic arthritis is a chronic inflammatory arthritis that affects the joints of up to a third of people with psoriasis. PsA presents in different patterns, and can cause arthritis of the end joints of the fingers and toes, arthritis of the spine, an oligoarthritis (fewer than five joints involved), a rheumatoid arthritis- like arthritis, and a very deformative and destructive arthritis. Patients typically experience pain and tenderness of the joints as well as morning stiffness. Psoriatic arthritis affects men and women equally.