Prevalence of peripheral spondyloarthritis among patients with ultrasound-confirmed enthesitis: Single-center cross-sectional study.

Peripheral SpA is not uncommon among patients presenting with enthesitis and more likely in cases with prolonged, extensive, and bilateral enthesitis with entheseal hypoechogenicity and Doppler signal. Musculoskeletal ultrasonography can facilitate the diagnosis of pSpA in patients presenting with enthesitis.