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Additional recommended knowledge

Spondyloarthropathies are a group of related inflammatory joint diseases associated with the MHC class I molecule HLA-B27. The term seronegative spondylarthropathy is used by medical practitioners because this set of conditions may mimic rheumatoid diseases such as rheumatoid arthritis, but serological (blood) tests are typically negative for rheumatoid factor (RhF).

Subgroups (with increased HLA-B27 frequency) are:

Whipple disease and Behçet disease may also be linked to HLA-B27, as may undifferentiated spondyloarthropathy.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Spondyloarthropathy". A list of authors is available in Wikipedia.
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