Our Psoriasis Main Article provides a comprehensive look at the who, what, when and how of Psoriasis
Definition of Psoriasis
Psoriasis: A reddish, scaly rash often located over the surfaces of the elbows, knees, scalp, and around or in the ears, navel, genitals or buttocks. Psoriasis is an autoimmune disease that is mediated by T lymphocytes. It is also a very common disease, Chronic plaque psoriasis affects approximately 2% of people around the world. About 10-15% of patients with psoriasis develop joint inflammation (inflammatory arthritis). Treatment options include topical steroid creams, tar soap preparations, and exposure to ultraviolet light. See also: Erythrodermic psoriasis; Flexural psoriasis; Guttate psoriasis; Inverse psoriasis; Plaque psoriasis ; Psoriatic arthritis. Last Editorial Review: 4/27/2011 5:27:15 PM Back to MedTerms online medical dictionary A-Z List 
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