Ankylosing spondylitis is associated with: (A) HLA-B27, (B) HLA-B-8, (C) HLA-DW4/DR4, (D) HLA-DR3
Answer is A. There is a strong correlation with HLA-B2790-95% of cases are positive for HLA-B27(Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 302, 426)