Psoriatic arthritis is an inflammatory autoimmune disorder that affects the skin and both proximal and distal joints.1
- Up to 30% of people diagnosed with psoriasis may actually have psoriatic arthritis.2-5
- People of all ages can develop psoriatic arthritis, but the peak incidence is between 30 and 50 years of age.5
- It has been observed that up to 57% of patients experienced joint damage by the time they were diagnosed with psoriatic arthritis.6,7
- In up to 70% of psoriatic arthritis patients, skin symptoms precede joint symptoms.1,8
- In psoriatic arthritis, joint symptoms generally present 10 years after skin symptoms, but both may present simultaneously.1,9
Ongoing research suggests that the pathogenesis of psoriatic arthritis is multifactorial, with the following factors playing important roles1:
- Genetic
- Environmental
- Immunologic
Pathogenesis of Psoriatic Arthritis and the Role of TNF
Tumor necrosis factor (TNF) plays a role in the pathogenesis of psoriatic arthritis. TNF can either directly or indirectly:1
- Increase migration of leukocytes into inflamed sites11
- Stimulate production of other proinflammatory cytokines11
- Promote cartilage destruction11
Because psoriatic arthritis can be a severe disease with significant functional impairment, early diagnosis is critical. The American Academy of Dermatology strongly encourages dermatologists to actively evaluate signs and symptoms of psoriatic arthritis at every patient visit.12
For information about the treatment guidelines from the American Academy of Dermatology,
download the AAD guidelines now.
You will need Adobe Acrobat Reader to view certain documents on this page. If you do not already have it, download it for free from Adobe's website. Get Adobe® Reader®.