HLA B27 is NOT seen in
High-Yield Explanation
Seronegative spondyloahropathies PAIR Psoriatic ahritis Ankylosing spondylitis Inflammatory bowel disease Reactive ahritis (Reiter's syndrome) Features Absence of serum autoantibodies Associated with HLA B27 Onset before 40 years Presence of uveitis, spine/large joint peripheral ahritis