Psoriasis 1 Psoriasis
Psoriasis 1 Psoriasis Psoriasis Classification and external resources Back and arms of a person with psoriasis [1] ICD-10 L40 [2] ICD-9 696 [3] OMIM 177900 [4] DiseasesDB 10895 [5] MedlinePlus 000434 eMedicine [6] [7] emerg/489 Dermatology:derm/365 plaque [8] derm/361 guttate [9] derm/363 nails [10] derm/366 pustular [11] Arthritis derm/918 [12] Radiology radio/578 [13] Physical Medicine pmr/120 [14] MeSH D011565 Psoriasis (/sɵˈraɪ.əsɨs/; from Greek ψωρίασις, meaning "itching condition" or "being itchy", from psora "itch" and -sis "action, condition"; also termed psoriasis vulgaris), is a common, chronic relapsing/remitting immune-mediated skin disease characterized by red, scaly patches, papules, and plaques, which usually itch. The skin lesions seen in psoriasis may vary in severity from minor localized patches to complete body coverage. The disease affects 2–4% of the general population. There are five main types of psoriasis: plaque, guttate, inverse, pustular, and erythrodermic. Plaque psoriasis is the most common form and typically manifests as red and white scaly patches on the top layer of the skin. Skin cells rapidly accumulate at these plaque sites and create a silvery-white appearance. Plaques frequently occur on the skin of the elbows and knees, but can affect any area, including the scalp, palms of hands and soles of feet, and genitals. In contrast to eczema, psoriasis is more likely to be found on the outer side of the joint. Fingernails and toenails are frequently affected (psoriatic nail dystrophy) and can be seen as an isolated sign. Inflammation of the joints in the Psoriasis 2 context of psoriatic disease, known as psoriatic arthritis, affects up to 30% of individuals with psoriasis.
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