Psoriatric (psoratic) rheumotoid arthritis - psoriatic arthritus
Psoriatric arthritis is an inflammatory disease affecting the joints of patients with psoriasis. Psoratic arthritis develops in 10-20% of patients with psoriasis.
Psoriatric RA
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Psoriatric arthritis is not the same as psoriasis, but the two conditions are related. Psoriasis patients can develop the psoriatric arthuritis, which happens in around one case out of three.
What is psoriatric arthritis?
Psoriatic arthritis characterizes by swollen joints through inflammation (this is the arthritis bit) and skin inflammation which is related to psoriasis. Psoriasis is a skin disease that affects 1-2% of the population in the western world. The signs of psoriasis are patchy areas of inflammation, often red and raised and with some silvery or grey-ish scale on the surface. The condition often affects places like the wrists, elbows and knees, ankles, fingers, toes, genital areas, anus, the scalp etc. Psoriatic arthritus can also affect the spine and the joints in the lower end of the back - known as the sacroiliac joints.- Psoriatic arthritis is equally common in male and female patients
- Psoriatic arthritis typically appear between the ages of 20 and 60
- Of people with psoriasis, about one third will also get psoriatric arthritis
Signs and symptoms of psoratic arthritis
- Morning stiffness
- Pain and/or swelling of toes and fingers
- Nails lifting up from the underlying skin
- Nails developing small holes (called pitting)
- Reduced motion range
Different types of psoriatic arthritis
The softest type of psoratic arthritis is called asymmetric PA. It usually will affect either the joints on one side only, or alternate joints on both sides. Inflammation and swelling in the tendons and ligaments can cause toes and fingers to look like small sausages. This condition is called dactylitis.Another type is where you experience pain in the joints on both sides of your body. This is called symmetric psoratic arthritis and it usually includes at least four joints on both sides. It is more common that women have symmetric psoratic arthritis and the severity of the psoriasis in this disease is often worse than in other cases.
The type called spondylitis is characterized by spinal pain. This can cause spinal inflammation but also inflammation in the neck or in the sacroiliac joints. There is also an increased risk of inflammation where tendons and ligaments are in contact with the spine. This is a progressive disease with gradually increasing pain and limitations in movement.
Arthritis mutilans is a very painful and disabling form of the condition. Only a very low percentage of patients with psoriatic arthritis will also have this variety. Arthritis mutilans will eventually lead to the permanent deformation of fingers and other small bones in the hands.
Distal interphalangeal joint predominant psoriatric arthritis (also called DIP) is very unusual and this condition affects mainly male patients. It will affect the small distal joints in toes and fingers.
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- Rumatoid arthritis - rheumotoid arthuritis (rheumatory arthritus)