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Psoriatic arthritis is a specific type of arthritis. It causes inflammation in and around the joints, usually the wrists, knees, ankles, fingers, lower back and neck.
Psoriatic arthritis is a specific type of arthritis that has been diagnosed in approximately 23 percent of people who have psoriasis, according to the Psoriasis Foundation’s 2001 Benchmark Survey.
It commonly affects the ends of the fingers and toes. It can also affect the spine. The disease can be difficult to diagnose, particularly in its milder forms and earlier stages. Early diagnosis, however, is important for preventing long-term damage to joints and tissue.
Most people with psoriatic arthritis also have psoriasis. Rarely, a person can have psoriatic arthritis without having psoriasis.
What are the symptoms?
How does it develop?
Psoriatic arthritis can develop at any time. On average, it appears about 10 years after the first signs of psoriasis. For most people it appears between the ages of 30 and 50. It affects men and women equally. In about one of seven people with psoriatic arthritis, arthritis symptoms occur before any skin lesions.
Like rheumatoid arthritis, psoriatic arthritis is thought to be caused by a malfunctioning immune system. Psoriatic arthritis is usually milder than rheumatoid arthritis, but some patients with psoriatic arthritis have as severe a disease as patients with rheumatoid arthritis.
Psoriatic arthritis can start slowly with mild symptoms, or it can develop quickly. It is very important to have as early and accurate a diagnosis as possible. Left untreated, psoriatic arthritis can be a progressively disabling disease. In fact, half of those with psoriatic arthritis already have bone loss by the time the disease is diagnosed.
How is it diagnosed?
There is no definitive test for psoriatic arthritis, but the following steps are usually involved:
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