<prompt> HLA-B27 is associated withOsteoporosisAnk spondylitisGoutRheumatoid arthritis  <response>: Ank.spondyIitis: 1093- Davidson 21st editionHLA-B 27 is found in 90 of white patients and 50 of black patients with ankylosing spondylitis.Because this antigen occurs in 8 of the healthy white population and 2 of healthy blacks, it is not a specific diagnostic test.HLA- B 27 is associated with1. Ankylosing spondylitis2. Reiters syndrome3. Reactive arthritis Yersinia, salmonella, Shigella, Chlamydia4. Psoriatic spondylitis5. A cute anterior uveitis Other conditions associated with HLAsHLA B-8M. gravis HyperthyroidismDW-4DR4Rheumatoid arthritis. P. vulgarisHLA DR3Glutein sensitive enteropathy Diabetes mellitus type IHLA-B5M. gravis. Chronic active hepatitisHLA-DR2Bechets syndrome Narcolepsy, Good pastures syndrome Multiple sclerosis 