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Psoriatic arthritis

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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Psoriatic arthritis

Psoriatic arthritis is a synovitis which occurs:

  • in individuals with psoriasis but without serum rheumatoid factor (it is an inflammatory seronegative spondyloarthropathy) (1)

  • in a person without psoriasis but with joint changes resembling those seen in rheumatoid arthritis the relationship between the skin and joint manifestations is unclear

  • the symptoms occur simultaneously in around 15% of people with the disease

  • in 60% of people the psoriasis precedes the arthritis

  • in 25%, the arthritis appears first

  • people with severe arthritis can have little or no skin disease, and vice versa
    • flare-ups of symptoms do not necessarily coincide (2)

Psoriatic arthritis may mimic rheumatoid arthritis or ankylosing spondylitis.

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