Diagnostic Approach for Labral Tears

Clinical Examination and Diagnosis

The American College of Radiology recommends MR arthrography as the gold standard for diagnosing labral tears, with a rating of 9/9 (usually appropriate) according to ACR Appropriateness Criteria 1, 2
The most consistent physical examination finding for labral tears is a positive anterior hip impingement test (FADIR test), as suggested by Praxis Medical Insights 3

The American College of Radiology suggests that plain radiographs should be the first imaging study for any acute shoulder pain, including standard views such as frontal (anteroposterior) view, at least two orthogonal views for trauma cases, and Grashey projection (30° posterior oblique) to profile the glenohumeral joint 1, 4
For suspected labral tears with negative or indeterminate radiographs in patients under 35 years, the American College of Radiology recommends MR arthrography as the preferred imaging study (rating 9/9) 1, 4
Standard MRI without contrast is less optimal (rating 7/9), and CT arthrography is an alternative (rating 5/9) if MRI is contraindicated 1, 4

MR arthrography with intra-articular injection of dilute gadolinium solution provides superior visualization compared to standard MRI, as reported by the Journal of the American College of Radiology 5, 1
In acute trauma settings, standard MRI may be sufficient as posttraumatic joint effusion can provide natural contrast, according to the American College of Radiology 1
High-resolution 3T MRI may improve visualization in some cases, as suggested by Praxis Medical Insights 2

The diagnostic approach should begin with plain radiographs to rule out fractures, dysplasia, and degeneration, followed by clinical examination and specific tests, and then proceed to MR arthrography for patients under 35 with suspected labral tear, as recommended by the American College of Radiology 1, 4
For patients with acute trauma, standard MRI may be sufficient due to natural joint effusion, and diagnostic intra-articular anesthetic injections should be considered for both diagnostic and therapeutic purposes, as suggested by Praxis Medical Insights 1, 2, 3