Fast Five Quiz: Ankylosing Spondylitis Signs and Symptoms

Herbert S. Diamond, MD

Disclosures

February 03, 2022

Inflammatory back pain is the most common symptom and the first manifestation of AS in approximately 75% of patients. The pain is usually dull and poorly localized to the gluteal and sacroiliac areas.

Approximately 50% of patients with AS have neck pain as an early symptom.

Enthesitis in AS presents as pain or stiffness with tenderness to palpation.

Dactylitis is present in approximately 6% of patients with AS. It is characterized by diffuse swelling of a whole finger or toe ("sausage digit"), which may be painful. It usually occurs in one or only a few digits at a time; if all digits of an extremity are involved, a different etiology should be considered.

Learn more about the clinical presentation of AS.

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