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Etiology and Pathophysiology

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Atlas of Psoriatic Arthritis

Abstract

Initially considered to be relatively benign and uncommon, one-third of patients with psoriasis have arthritis, and a majority of those affected experience a chronic, progressive course [1],[2]. Psoriatic arthritis (PsA) is distinguished from rheumatoid arthritis (RA) by its unique clinical manifestations, characteristic radiographic findings, and the absence of rheumatoid factor. Patients often present with focal inflammation at multiple sites that include skin, joints, and tendon insertion sites or entheses. Clues to the pathogenesis of the disease have arisen out of observations that reveal a strong family history of psoriasis in PsA patients, an association of skin and joint disease with class I major histocompatibility complex (MHC) alleles, and paternal transmission. Environmental factors such as trauma or infection have also been shown to trigger skin and joint inflammation. The uncovering of the pathogenesis of PsA has been limited by small numbers of studies, the paucity of appropriate animal models, and the confounding presence of a disease within a disease, whereby factors associated with psoriasis can obscure those related to arthritis.

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Ritchlin, C., Barton, J. (2008). Etiology and Pathophysiology. In: Mease, P.J., Helliwell, P.S. (eds) Atlas of Psoriatic Arthritis. Springer, London. https://doi.org/10.1007/978-1-84628-897-5_2

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  • DOI: https://doi.org/10.1007/978-1-84628-897-5_2

  • Publisher Name: Springer, London

  • Print ISBN: 978-1-84628-896-8

  • Online ISBN: 978-1-84628-897-5

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