Abstract Background Psoriatic arthritis (PsA) is a specific form of inflammatory arthritis
associated with psoriasis affecting in the same measure men and women but with a …

Thirty years after its discovery, 1, 2 the association between HLA-B27 and ankylosing
spondylitis remains the strongest known relationship between a major histocompatibility …

Objective To determine the incidence of psoriatic arthritis (PsA) in a US population and
describe trends in incidence and mortality over 5 decades. Methods The previously …

There are large differences in the antigenicity and biology of the ReA-associated bacteria.
For induction of arthritis, the relevance seems to be only that antigenic material reaches the …

OBJECTIVE: To analyze patterns of disease in a population of Brazilian patients with
primary ankylosing spondylitis (AS). METHODS: Retrospective study (1988-98) analyzing …

Objective. To investigate the incidence and the prevalence of ankylosing spondylitis (AS) in
a defined area of northwest Greece with a total population of about 500 000 inhabitants …

The spondyloarthropathies include ankylosing spondylitis, reactive arthritis (including
Reiter's syndrome), psoriatic arthritis, inflammatory bowel disease–associated …

The aim of the study was to analyse the 2-year follow-up of a series of patients with the
diagnosis of undifferentiated spondyloarthropathy (uSpA). A prospective study was carried …

HLA-B27 is virtually absent in most of the sub-Saharan Africa populations, and ankylosing
spondylitis is rare; only a few patients have been reported from central and southern Africa …

Ankylosing spondylitis (AS) is an autoimmune disease with a chronic inflammatory arthritis.
The critical role of methylation in the biology of immunocytes has increasingly been …