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24 - Inflammatory Skin Diseases

from PART V - INFLAMMATORY DISEASES/HISTOLOGY

Published online by Cambridge University Press:  05 April 2014

By
Gayathri K. Perera  and
Frank O. Nestle
Edited by
Charles N. Serhan ,
Peter A. Ward  and
Derek W. Gilroy
With contributions by
Samir S. Ayoub
Gayathri K. Perera
Affiliation:
King's College London
Frank O. Nestle
Affiliation:
King's College London School of Medicine
Charles N. Serhan
Affiliation:
Harvard Medical School
Peter A. Ward
Affiliation:
University of Michigan, Ann Arbor
Derek W. Gilroy
Affiliation:
University College London
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Summary

PSORIASIS

Psoriasis is a common, chronic inflammatory skin disease with an overall prevalence of 2%–3% of the world population with a higher prevalence in the United States and Canada (4.6% and 4.7%, respectively) compared to a lower prevalence of 0.4–0.7% in Africans, African Americans, and Asians [1].

Psoriasis can appear at any age but there is a tendency toward a peak at ages 20–30 years and then again at ages 50–60 years. It has a chronic relapsing and remitting nature in response to a variety of stressors. It is rarely life threatening but is associated with a high degree of morbidity. Psoriasis can be limited to skin but can also be associated with debilitating arthritis in 5%–30% of sufferers. Its burden on health care economy is on par with cardiovascular disease, diabetes, and depression.

Its aetiology is multifactorial, combining genetics, immunity, and environmental triggers. There is a 2–3-fold increase in risk of developing psoriasis in monozygotic versus dizygotic twins, and results of WGAS (whole genome wide association scans) show that psoriasis is a complex genetic disease [2]. At least 19 gene loci have been implicated but replication of a single locus has been provided for only a few of these. One of these regions lies on a 210-kb stretch of DNA on the short arm of chromosome 6 (termed PSORS1) which includes genes coding for HLA-Cw6, a potential immunological candidate gene, and corneodesmosin, a potential epidermal structure related candidate gene [3].

Type
Chapter
Information
Fundamentals of Inflammation , pp. 299 - 303
Publisher: Cambridge University Press
Print publication year: 2010

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References

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