title: Sonographic evaluation of anterosuperior hip labral tears with magnetic resonance arthrographic and surgical correlation.
abstract: OBJECTIVE
  The purpose of this study was to retrospectively evaluate the sonographic findings compared with magnetic resonance (MR) arthrographic and arthroscopic findings in diagnosis of anterosuperior labral tears of the hip.
  
  
  METHODS
  The Ethics Committees of our institution did not require patient approval or informed consent for this retrospective study. Sixteen symptomatic patients (4 male and 12 female; mean age, 43 years) with sonography, MR arthrography, and arthroscopy were enrolled. At arthroscopy, 11 patients were shown to have anterosuperior labral tears. We evaluated the findings of the anterosuperior acetabular labrum on sonography, with an emphasis on the presence or absence and types of labral tears, and correlated the findings with MR arthrography and arthroscopy. The types of tears were classified into radial flap, radial fibrillated, and longitudinal peripheral (base) tears. We calculated the sensitivity, specificity, and accuracy of sonography and MR arthrography.
  
  
  RESULTS
  On sonography, 12 of 16 patients (75%) had a correct diagnosis of the presence or absence of an anterosuperior labral tear. On MR arthrography, 14 of 16 patients (88%) had a correct diagnosis of the presence or absence of a tear. The sensitivity, specificity, and accuracy for the diagnosis of tears by sonography and MR arthrography were 82%, 60%, and 75% and 91%, 80%, and 88%, respectively.
  
  
  CONCLUSIONS
  When the arthroscopic results were used as the reference standard, our preliminary study revealed that sonography managed to show anterosuperior labral abnormalities, although it had a lesser diagnostic ability than MR arthrography in diagnosing anterosuperior labral tears. Additional investigations including larger numbers of patients are required to determine whether sonography can be an alternative or adjunctive imaging technique for diagnosis of hip labral tears, especially in patients who decline or are unable to undergo MR arthrography.
authors.affiliation: Department of Radiology, Kyung Hee University Hospital at Gangdong, College of Medicine, Seoul, Korea. jinooki@hitel.net
authors.forename: Wook
authors.initials: W
authors.lastname: Jin
authors.forename: Kang Il
authors.initials: KI
authors.lastname: Kim
authors.forename: Kee Hyung
authors.initials: KH
authors.lastname: Rhyu
authors.forename: So Young
authors.initials: SY
authors.lastname: Park
authors.forename: Hyun Cheol
authors.initials: HC
authors.lastname: Kim
authors.forename: Dal Mo
authors.initials: DM
authors.lastname: Yang
authors.forename: Ji Seon
authors.initials: JS
authors.lastname: Park
authors.forename: Seong Jin
authors.initials: SJ
authors.lastname: Park
authors.forename: Kyung Nam
authors.initials: KN
authors.lastname: Ryu
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging / Q000293:injuries* / Q000601:surgery; D000293:Adolescent; D000328:Adult; D001175:Arthrography / Q000379:methods; D001182:Arthroscopy / Q000379:methods; D002358:Cartilage, Articular / Q000000981:diagnostic imaging / Q000293:injuries* / Q000601:surgery; D005260:Female; D025981:Hip Injuries / Q000000981:diagnostic imaging* / Q000601:surgery*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D016896:Treatment Outcome; D014463:Ultrasonography