Troubles immunologiques et immunothérapie
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Note on Psoriasis or Psoriatic Arthritis

Jung D. Kim

Psoriasis is a type of skin disease that causes itchy, red scaly patches topped with silvery scales generally on the knees, elbows, trunk and scalp. Psoriatic arthritis is a type of arthritis which affects psoriasis patients. Generally people develop psoriasis first and are later diagnosed with psoriatic arthritis, but there are some cases reported where the joint problems begin before the skin patches appear. Usually psoriatic arthritis appears in people between the age group of 30 to 50, but it can also affect in childhood. For this disease men and women are equally at risk. Children with psoriatic arthritis are also at risk to develop uveitis (an inflammation of the middle layer of the eye). Approximately 30% of people with psoriasis develop psoriatic arthritis. Sometimes, the arthritis can appear before the skin disorder.