Extraarticular features of Psoriatic arthritis

Extraarticular features of Psoriatic arthritis

Are there any extraarticular features associated with PsA?

Unlike rheumatoid arthritis, PsA is associated with only a few extraarticular features. Nail changes are seen in 80% of patients with arthritis, as opposed to only 30% with psoriasis only. These changes include pitting, onycholysis, oil spot sign, hyperkeratosis, and nail crumbling. Eye disease includes conjunctivitis in 20% and acute iritis in over 7% of cases. Iritis can be bilateral and is more commonly associated with axial involvement. Other less common features include oral ulcers, urethritis, nonspecific colitis, and rarely dilatation of base of aortic arch causing aortic insufficiency.

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