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Related Experiment Videos

HLA-B27-positive oligarthritis.

E Genth, H Peuckert, E Brude

    Zeitschrift Fur Rheumatologie
    |September 1, 1978
    PubMed
    Summary

    Human Leukocyte Antigen B27 (HLA-B27) positive patients often present with undifferentiated polyarthritis. This pattern differs from rheumatoid arthritis and psoriatic arthritis, aiding in diagnosing rheumatic diseases.

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    Area of Science:

    • Rheumatology
    • Immunogenetics
    • Clinical Diagnosis

    Background:

    • Human Leukocyte Antigen B27 (HLA-B27) is strongly associated with spondyloarthropathies.
    • Differentiating HLA-B27 associated arthropathies from other rheumatic diseases like rheumatoid arthritis (RA) and psoriatic arthritis (PsA) can be challenging.
    • Understanding the spectrum of rheumatic diseases in HLA-B27 positive individuals is crucial for accurate diagnosis and management.

    Purpose of the Study:

    • To characterize the clinical and radiographic features of HLA-B27 positive patients with polyarthritis, excluding ankylosing spondylitis (AS) and Reiter's disease.
    • To compare the arthritic patterns observed in these patients with those of established rheumatic conditions.
    • To evaluate the utility of HLA-B27 typing in the differential diagnosis of unclassifiable polyarthritis.

    Main Methods:

    • Retrospective analysis of 406 HLA-B27 positive patients with rheumatic diseases.
    • Selection of 68 cases with polyarthritis, excluding AS and Reiter's disease.
    • Clinical assessment including American Rheumatism Association (ARA) criteria, presence of psoriasis, joint involvement, sacroiliitis, erosions, rheumatoid factor, and visceral manifestations.
    • Comparison of arthritic patterns with rheumatoid arthritis, psoriatic arthritis, and ankylosing spondylitis cohorts.

    Main Results:

    • Out of 68 selected cases, 23 met ARA criteria for RA, and 5 had polyarthritis with psoriasis.
    • The remaining 40 patients presented with asymmetric oligoarthritis, primarily affecting lower limbs in young adult men, with 10 cases showing sacroiliitis.
    • Joint erosions, rheumatoid factor positivity, and visceral manifestations were infrequent.
    • The arthritic pattern in HLA-B27 positive oligoarthritis differed significantly from RA and PsA, but resembled peripheral joint involvement in AS, with a higher incidence of coxitis in AS.

    Conclusions:

    • A distinct pattern of peripheral oligoarthritis is observed in a subset of HLA-B27 positive patients without overt AS or Reiter's disease.
    • This pattern is distinguishable from rheumatoid arthritis and psoriatic arthritis.
    • HLA-B27 typing serves as a valuable tool for the early diagnosis of AS and aids in the differential diagnosis of unclassifiable polyarthritis.

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