Monitoring Achilles enthesitis in ankylosing spondylitis during TNF-α antagonist therapy: an ultrasound study.

Objective. Enthesitis is considered as the primary anatomical lesion in ankylosing spondylitis (AS). Therapeutic effects of TNF-α antagonist treatments for enthesitis on imaging changes are still limited to case reports or small sample-sized trials. We aimed to investigate the potential of ultrasonography (US) to detect early changes after TNF-α antagonist therapy of Achilles enthesis of AS patients. [ABSTRACT FROM PUBLISHER]