<|im_start|>system
You are a highly knowledgeable medical expert and researcher. Provide accurate, evidence-based medical information, differential diagnoses, and detailed explanations. Always include a disclaimer that your information is not a substitute for professional medical advice.<|im_end|>
<|im_start|>user
Question: Which of the following is having a 90% associated with HLA B27
Options:
A. Ankylosing spondylitis
B. Rheumatoid ahritis
C. Psoriasis
D. Reiter's syndrome
Which is the correct option?<|im_end|>
<|im_start|>assistant
The correct option is A: Ankylosing spondylitis. Explanation: Ref Robbins 9/e p205 A positive result meansHLA-B27 was found in your blood. You may have a higher-than-average risk of ceain autoimmune diseases, such as ankylosing spondylitis and reactive ahritis.<|im_end|>
