4 board-style questions on ankylosing spondylitis in the PulseMD family medicine question bank, written against current guidelines with the reference cited on each question. Two free samples below; the full set with answers, explanations, and spaced review is free to start.
A 24-year-old man presents with a 6-month history of low back pain and stiffness that is worst in the morning and improves with exercise. He reports the pain often wakes him during the second half of the night. On exam, he has reduced lumbar flexion. Which genetic marker is MOST strongly associated with this patient's likely diagnosis?
A 26-year-old man has had inflammatory low back pain for 8 months. He is HLA-B27 positive. Pelvic X-ray shows no definitive sacroiliitis. His symptoms have not responded to two different NSAIDs over 4 weeks each. Which imaging modality is MOST appropriate to evaluate for early sacroiliitis?
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