Fast Five Quiz: Psoriatic Arthritis Presentation and Diagnosis

Herbert S. Diamond, MD; Eric M. Ruderman, MD


December 23, 2021

Recognizing the patterns of joint involvement seen in psoriatic arthritis is essential to its diagnosis. Five patterns have been identified. They are:

  • Asymmetrical oligoarticular arthritis

  • Symmetrical polyarthritis

  • Arthritis mutilans

  • Distal interphalangeal arthropathy

  • Spondylitis with or without sacroiliitis

Approximately one third of patients with psoriatic arthritis may experience ocular comorbidities, including notably high incidence rates of uveitis, and conjunctivitis in 20% of patients. Scleritis and keratoconjunctivitis sicca can occur, but they are rare.

Subcutaneous nodules are rarely found in patients with psoriatic arthritis. If nodules are present in a patient who has psoriasis and arthritis, particularly if the rheumatoid factor (RF) titer is positive, they may indicate the coincidental occurrence of concomitant psoriasis and rheumatoid arthritis.

Learn more about the physical examination of patients with psoriatic arthritis.


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