Fast Five Quiz: Polyarticular Psoriatic Arthritis

Herbert S. Diamond, MD


February 01, 2022

Ankylosing spondylitis can produce back pain comparable with that associated with polyarticular psoriatic arthritis, but it is not associated with the peripheral arthropathy or skin lesions that are features of polyarticular psoriatic arthritis.

Enthesopathy, or inflammation at tendon or ligament insertions into bone, may be seen in patients with polyarticular psoriatic arthritis. It is most often observed at the attachment of the Achilles tendon and the plantar fascia to the calcaneus, with the development of insertional spurs.

Patients with polyarticular psoriatic arthritis may develop dactylitis. A recent longitudinal study showed that more patients with polyarticular arthritis present with dactylitis compared with those with oligoarthritis.

When localized to the foot or toe, the symptoms of polyarticular psoriatic arthritis may be mistaken for gout. A careful differential diagnosis is essential when patients have symptoms of inflammatory disease.

Learn more about diagnostic considerations for polyarticular psoriatic arthritis.


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