Seronegative spondyloarthropathies - reactive arthritis
Description
- Sterile inflammatory arthritis following an extra-articular infection, typically 1-4 weeks later
- The organism is NOT in the joint - this is the defining concept and the reason synovial culture is negative
- Member of the seronegative spondyloarthropathy family (with AS, psoriatic, enteropathic and undifferentiated SpA)
- Shared features: HLA-B27, enthesitis, dactylitis, asymmetric lower-limb oligoarthritis, axial disease, uveitis, RF-negative
- *"Reiter syndrome" is obsolete (eponym abandoned - the triad arthritis + urethritis + conjunctivitis* occurs in only ~1/3)
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