A 29-year-old man has 8 months of low back pain that improves with exercise and worsens with rest. Morning stiffness lasts 90 minutes. Sacroiliac

Question

A 29-year-old man has 8 months of low back pain that improves with exercise and worsens with rest. Morning stiffness lasts 90 minutes. Sacroiliac joint tenderness is present. Which of the following is the most likely diagnosis?

Accepted Answer

Axial spondyloarthritis

Answer

Metastatic prostate cancer

Answer

Osteoporotic compression fracture

Answer

Mechanical lumbar strain

Answer

Cauda equina syndrome

Ankylosing spondylitis — USMLE Step 3 MCQ

A 29-year-old man has 8 months of low back pain that improves with exercise and worsens with rest. Morning stiffness lasts 90 minutes. Sacroiliac joint tenderness is present. Which of the following is the most likely diagnosis?