Oct 30, 2018 These latter conditions include reactive arthritis (previously referred to as Of patients with uveitis, 19-88% have the HLA-B27 phenotype, .In the UK, HLA-B27 is present in 90–95% of patients with ankylosing spondylitis, 60–90% of patients with reactive arthritis, 50–60% of patients with psoriatic .Scand J Rheumatol. 1997;26(4):269-71. HLA-B27 in French patients with rheumatoid arthritis. Saraux A(1), Guedes C, Allain J, Valls I, Baron D, Youinou.