Psoriatic arthritis

Psoriasis arthritsi (PA), also known as arthropathic psoriasis, is an inflammatory joint disease associated with psoriasis. The course of the disease is prolonged, easy to relapse, and ankylosis of the joint is formed in the later stage, leading to disability. Psoriasis is more common in patients with arthritis, 2 to 3 times more than the general population, and arthritis is also more common in patients with psoriasis. Leczinsky found in a 10-year survey that the incidence of arthritis in psoriasis is 6.8%, which is significantly higher than the incidence of arthritis in non-psoriasis populations. Women are more vulnerable than men. According to Nobol, PA accounts for approximately 1% of patients with psoriasis [5]. Because this disease, Reiter syndrome, and ankylosing spondylitis are related to HLA-B27, and rheumatoid factor is negative, and the clinical manifestations are similar, they are classified as serum-negative spondyloarthropathy.