“…it is expensive, has low accessibility, is inconvenient to some of the patients, lacks sensitivity and specificity for peripheral enthesitis and inable to image multiple entheses sites simultaneously [4,20,21]. It is shown that ultrasonography is a valid and reliable assessment tool for the evaluation of enthesitis in spondyloarthritis [4,10,19] and superior to show structural change, calcification and inflammatory activity in the tendons and ligaments [23,23].…”