Medicine 45-year-old man complains of back pain and multiple joints pain. X-Ray shows bilateral sacroilitis. Diagnosis could be: March 2005 A Rheumatoid ahritis B Ankylosing spondylitis C Psoriatic ahritis D Osteoahritis 💡 Explanation 45-year-old man complains of back pain and multiple joints pain. X-Ray shows bilateral sacroilitis. Diagnosis could be: March 2005 ✓ Correct Answer: B. Ankylosing spondylitis