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Arthritis in psoriasis

L Green, O L Meyers, W Gordon

    Annals of the Rheumatic Diseases
    |August 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Psoriasis patients frequently develop psoriatic arthritis, affecting over 40%. This study highlights associations between specific arthritis types, nail changes, and genetic markers in psoriasis patients.

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    Area of Science:

    • Rheumatology
    • Dermatology
    • Immunogenetics

    Background:

    • Psoriasis is a chronic inflammatory skin condition.
    • Psoriatic arthritis (PsA) is a common comorbidity, but its prevalence and specific manifestations in unselected patient cohorts require further elucidation.
    • Understanding PsA's genetic associations can aid in diagnosis and management.

    Purpose of the Study:

    • To determine the prevalence of psoriatic arthritis in a group of unselected psoriasis patients.
    • To investigate the association of specific arthritis patterns (peripheral, sacroiliitis, distal interphalangeal) with psoriasis and nail dystrophy.
    • To explore potential genetic associations (tissue typing) with psoriatic arthritis in different ethnic groups.

    Main Methods:

    • A cohort of 61 unselected patients with psoriasis was assessed.

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  • Defined criteria were used to diagnose arthritis, including peripheral arthritis and sacroiliitis.
  • Nail dystrophy was evaluated, and tissue typing (HLA B and A locus) was performed for genetic analysis.

    • Main Results:

    • Arthritis was present in 41.6% of the patients.
    • Sacroiliitis was observed in 43% of patients, while peripheral arthritis was present in 15.5%.
    • Distal interphalangeal arthritis showed a strong association with psoriasis and nail dystrophy. HLA B23 and B17 were associated with Caucasoid psoriatics, and A1/B8 with mixed Caucasoid-Negroid psoriatics.

    Conclusions:

    • Psoriatic arthritis is highly prevalent in psoriasis patients.
    • Specific clinical features like distal interphalangeal arthritis and nail dystrophy are significant indicators.
    • Genetic factors, including specific HLA haplotypes, play a role in the susceptibility to psoriatic arthritis.