About 10-30% of psoriasis patients are prone to psoriatic arthritis. It can develop at any age, but most often it begins in the period from 30 to 50 years.
The cause of psoriatic arthritis is unknown, but genetic factors, along with the pathological response of the immune system, can play a role in the development of the disease.
Symptoms of psoriatic arthritis
Your doctor should refer to the following symptoms:
- Stiffness in the joints;
- Pain or swelling in the joints;
- Irritation and reddening of the eyes.
In order to detect psoriatic arthritis, the doctor will conduct an external review. He can assign blood tests, articular fluid, as well as roentgenography to determine the affected area and exclude other diseases. The presence of psoriatic plaques, of course, will make it easier for the doctor to diagnose psoriatic arthritis.
Psoriatic arthritis is diagnosed mainly on the basis of an external review of the presence of signs of psoriasis and characteristic inflammation of the joints of the spine and other joints. In psoriatic arthritis, blood tests, such as high ROE, reflect the presence of inflammation in the joints and other organs. Other blood tests, such as studies on rheumatoid factor, are conducted to exclude the diagnosis of rheumatoid arthritis.
In the case of inflammation of large joints, such as the knees, joint puncture may be performed (arthrocenza). This is a procedure in which a flask (aspiration) of a fluid from inflamed joints is carried out with a sterile needle. The fluid is then analyzed for the presence of infection, gouty crystals and other pathogens of inflammatory processes. During the procedure, steroids can be used to relieve pain and swelling in the inflamed joint.
Roentgenography may show changes in the cartilage or bone defeat, characteristic of arthritis of the spine, sacroiliac joints and limb joints. A typical X-ray pattern appears to be bone erosion as a result of arthritis. The blood test for the genetic marker HLA-B27 gives a positive result in more than 50% of psoriatic arthritis patients suffering from inflammation of the spine.