Update on MR Imaging of the Acetabular Labrum.

Acetabular labral tears are a mechanical cause of hip pain. Hip MR imaging should be performed on 3T magnets using small field of view and high-resolution imaging. If using a lower strength magnet, direct arthrography should be performed. The following should be used in the assessment for labral tear abnormalities on MR (or MR arthrography): labral morphology, abnormal T2 signal (or contrast) extension into the labral substance or chondrolabral junction. Description of the labral tear and extent of tear is useful for the hip preservation surgeon. Understanding the pitfalls around the acetabular labral complex will help avoid misinterpretation of labral tears.