Psoriasis: epidemiology
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Updated: Jul 10, 2026

Measuring Psoriasis Severity at Home
Published on: March 1, 2024
Johann E Gudjonsson1, James T Elder
1Department of Dermatology, University of Michigan School of Medicine, Box 0932, Ann Arbor, MI 48109-0932, USA. johanng@med.umich.edu
Abstract:
Psoriasis is a chronic, inflammatory and hyperproliferative skin disease with a genetic basis. While epidermal hyperplasia and altered keratinocyte differentiation are prominent features, considerable evidence indicates that psoriasis is immunologically mediated. Recently, the identification of HLA-Cw6 as the disease allele conferring susceptibility to psoriasis has provided a focus for elucidation of these events. In this article, we will focus on the epidemiology of psoriasis and its associated arthritis.
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