will not show a labral tear but AP and lateral views should be performed to exclude any bony abnormality such as degenerative changes, coxa profunda, protrusio acetabuli, acetabular retroversion, abnormal femoral head neck offset or femoral head asphericity
investigation of choice is a magnetic resonance arthrogram (MRA) which has a high sensitivity and specificity
labral detachments are well demonstrated using contrast
gold standard remains hip arthroscopy
tears can be directly visualized and treated accordingly
Reference:
Groh MM, Herrera J. A comprehensive review of hip labral tears. Curr Rev Musculoskelet Med 2009; 2: 105-17.
Beaule PE, O'Neill M, Rakhra K. Acetabular labral tears. J Bone Joint Surg Am 2009; 91: 701-10.
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