Reactive arthritis and undifferentiated peripheral spondyloarthritis share human leucocyte antigen B27 subtypes and serum and synovial fluid cytokine profiles.
Jyoti Ranjan ParidaSandeep KumarSakir AhmedSmriti ChaurasiaRatnadeep MukherjeeRajeev SinghBalachandran RavindranAggarwal AmitaRamnath MisraPublished in: Rheumatology (Oxford, England) (2021)
ReA and upSpA have similar HLA-B27 subtype associations and similar cytokine profiles. They should be considered as a single entity during studies as well as clinical management.