The purpose of this study, published in December 2016, was to investigate the accuracy of magnetic resonance imaging without arthrography on a 3 Tesla scanner, compared with hip arthroscopy, in assessing the pathology of the articular cartilage and of the labrum in patients with suspected femoroacetabular impingement.
42 consecutive cases with possible femoroacetabular impingement syndrome (FAI) were studied, all of which underwent 3 Tesla magnetic resonance imaging without arthrography and hip arthroscopy. The magnetic resonance images were assessed by two musculoskeletal radiologists in order to determine the presence of tears of the labrum and of the acetabular articular cartilage. The acetabular articular cartilage was classified as normal, as degeneration/fissuring, as delamination or as denudation. The magnetic resonance findings were compared with hip arthroscopy. The sensitivity, specificity, accuracy and predictive value of magnetic resonance imaging were recorded, using arthroscopy as the reference standard.
42 hips were assessed, in 38 patients, with a mean age of 29 years. The mean interval between the magnetic resonance scan and the arthroscopy was 154 days. Magnetic resonance imaging revealed 41 cases with labral tears, 11 cases with an abnormality of the articular cartilage of the femoral head and 36 cases with lesions of the acetabular articular cartilage. Of the 36 cases with articular cartilage lesions on magnetic resonance imaging, 7 were characterised as degeneration, 26 as delamination and 3 as denudation, with disagreement between magnetic resonance imaging and arthroscopy observed in 10 cases.
The authors concluded that 3 Tesla magnetic resonance imaging without arthrography is a highly accurate technique for assessing the labrum and the articular cartilage in patients with a clinical suspicion of femoroacetabular impingement.
Source: “Skeletal Radiology”, December 2016
Hip Arthroscopy
The accuracy of 3 Tesla MRI without arthrography in assessing intra-articular hip pathology in femoroacetabular impingement
Dr Alexandros P. Tzaveas
Orthopaedic Surgeon
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Summary
- 42 consecutive cases with possible femoroacetabular impingement syndrome (FAI) were studied, all of which underwent 3 Tesla magnetic resonance imaging without arthrography and hip arthroscopy.
- The magnetic resonance images were assessed by two musculoskeletal radiologists in order to determine the presence of tears of the labrum and of the acetabular articular cartilage.
- The acetabular articular cartilage was classified as normal, as degeneration/fissuring, as delamination or as denudation.
- The magnetic resonance findings were compared with hip arthroscopy.
- The sensitivity, specificity, accuracy and predictive value of magnetic resonance imaging were recorded, using arthroscopy as the reference standard.
hiparthroscopyFAIintra-articular injection
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