Gao G, et al. - Individuals (n = 195) who attended the sports medicine clinic of our department and underwent arthroscopic surgery for the diagnosis of an anterosuperior acetabular labral tear (one of the most prevalent causes of hip joint pain) between June 2014 and April 2018 were recruited in this study by the researchers in order to examine diagnostic value of ultrasound in acetabular labral tears in comparison with MR imaging, using arthroscopic surgery as the gold standard in a relatively big sample size. A total of 184 had arthroscopically validated anterosuperior acetabular labral tear. The sensitivity, specificity, positive predictive value (PPV), negative predictive value, and accuracy by ultrasound, retrospectively, were 68.5%, 81.8%, 98 4%, 13.4%, and 69.2%, respectively. The sensitivity, specificity, PPV, negative predictive value, and accuracy, respectively, were 84.8%, 63.6%, 97.5%, 20.0%, and 83.6%, for MR imaging.