Diagnosis of AS is based upon a combination of clinical, laboratory, and imaging findings characteristic of the disease alongside the exclusion of other relevant diagnoses such as chronic mechanical back pain, fibromyalgia, or sacroiliac joint infection.[1]
How is ankylosing spondylitis diagnosed?
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•Last Updated: May 16, 2025
Ankylosing spondylitis is diagnosed through a combination of clinical evaluations, laboratory tests, and imaging findings that are specific to the disease, along with ruling out other conditions like chronic mechanical back pain, fibromyalgia, and sacroiliac joint infection.