<prompt> True statements about ankylosing spondylitis include all except -a HLA-B27 is found in 90 of sufferersb Uveitis is found in 15 to 20 of sufferersc The conditions is commoner in femaled The radiological changes can occur in the spine before symptomsbcdacdacbd  <response>: HLA - B27 is positive in 90-95 of cases.Uveitis occurs in 40 of patients Harrison 17th e 2111Ankylosing spondylitis is more common in males.Radiological changes do not occur before clinical symptoms :-One of the drawback to radiography is that the disease may be present for 7-10 years before changes are significance enough to be visualized with conventional X-rays. Thus patients presenting with early - stage ankylosing spondylitis will most likely have a negative X-ray. Medifocus Guidebook on ankylosing spondylitis 