Evaluation and Management of Suspected Labral Tear
Begin with plain radiographs of the pelvis and hip (AP pelvis and 45° Dunn view), followed by MR arthrography if radiographs are negative or equivocal, as this is the diagnostic test of choice for confirming labral tears. 1
Initial Diagnostic Workup
Clinical Presentation to Assess
- Anterior hip or groin pain is the most common complaint (occasionally buttock pain)
- Mechanical symptoms: clicking, locking, giving way, or sharp catching pain with rotation 2, 3, 4
- Pain in hyperflexion and with rotational movements 2
Physical Examination
The anterior hip impingement test is the most consistent and reliable clinical finding, with 100% specificity and 59% sensitivity 5. A positive test strongly suggests labral pathology, while a negative test does not rule it out 5.
Other examination findings include:
- FABER test
- Resisted straight leg raise test
- Assessment for associated femoroacetabular impingement (FAI) 4
Imaging Algorithm
Step 1: Plain Radiographs (ALWAYS first) 1
- Standing AP pelvis view
- 45° Dunn view (minimum requirement) 2
- Assess for: dysplasia, FAI morphology (CAM/Pincer), degenerative changes, lateral center edge angle (LCEA)
Step 2: Advanced Imaging (when radiographs negative/equivocal)
MR arthrography (direct) is superior to all other modalities for labral tear diagnosis 1. This involves intra-articular injection of dilute gadolinium (1:200 solution) and is the established gold standard short of arthroscopy 1.
Alternative imaging options in descending order of preference:
- 3.0 Tesla MRI without contrast may obviate need for arthrography in some cases 1
- 1.5 Tesla MRI without contrast has shown satisfactory results for labral/cartilage lesions 1
- CT arthrography (alternative when MRI contraindicated) 1
- Ultrasound has 94% sensitivity compared to MR arthrography and can reliably diagnose most anterior acetabular labral tears, particularly useful if impingement test is negative 5
Important caveat: MR arthrography demonstrates only moderate magnitude and high precision for labral diagnosis per consensus data 6. Labral findings are common in asymptomatic individuals and must correlate with clinical presentation 6.
Diagnostic Injection
Perform image-guided intra-articular injection with anesthetic (±corticosteroid) if uncertainty exists whether pain is intra-articular in origin 2. Pain relief confirms the hip joint as the pain source and helps differentiate from referred pain (spine, knee, pelvis) 1.
Management Strategy
Nonoperative Treatment (First-Line)
All patients should undergo minimum 6 months of conservative management before considering surgery 2, 4:
- Activity modification and relative rest
- NSAIDs and pain medications
- Targeted physical therapy (though evidence is mixed on effectiveness) 4
- Intra-articular corticosteroid injection for symptom control 3
Prognostic Factors Affecting Surgical Success
Consider these factors when counseling patients (unanimous consensus) 2:
- Age (younger patients have better outcomes)
- Pain severity
- Presence of dysplasia
- Degree of degenerative changes (Tönnis grade)
- Associated cartilage damage
Surgical Indications
Surgery is indicated when conservative treatment fails after 6 months AND there is confirmed labral pathology with appropriate clinical correlation 3, 4.
Current surgical priorities 7:
- Labral preservation through repair when tissue is viable (preferred over debridement)
- Labral reconstruction for irreparable tissue
- Correction of underlying osseous abnormalities (CAM/Pincer lesions)
- Capsular management
Arthroscopy remains the gold standard for both diagnosis and treatment 3, 4.
Post-Surgical Considerations
- Minimum 6 months should elapse after surgery before reinvestigation for persistent symptoms 2
- Return to sport typically occurs at 6-8 months but varies by sport demands 7
- Sport-specific training timing achieved unanimous consensus among experts 2
Critical Pitfalls to Avoid
- Do not skip plain radiographs - they must be obtained first to assess for structural abnormalities and alternative diagnoses 1
- Do not assume imaging findings equal pathology - labral tears are common incidental findings in asymptomatic individuals 6
- Do not rush to surgery - ensure adequate trial of conservative management unless obvious mechanical pathology exists 4
- Do not ignore associated pathology - assess for FAI morphology, dysplasia, and cartilage damage which affect prognosis 6, 2
- Recognize delayed diagnosis is common - labral tears frequently go undiagnosed for extended periods due to nonspecific presentation and need for specialized imaging 4