Sensitivity and specificity of spinal inflammatory lesions assessed by whole‐body magnetic resonance imaging in patients with ankylosing spondylitis or recent‐onset inflammatory back pain

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Abstract
Objective: To determine the diagnostic utility of different spinal inflammatory lesions assessed by whole‐body magnetic resonance imaging (MRI) in patients with ankylosing spondylitis (AS) or with recent‐onset inflammatory back pain (IBP) compared with healthy controls.Methods: We scanned 35 consecutive patients with AS fulfilling the modified New York criteria, 25 patients with IBP of 2 CIL.Conclusion: Diagnostic utility of STIR MRI for AS is optimal when ≥2 CIL are present. A single CIL can be found in up to 26% of healthy individuals.

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