Hip pathology: the diagnostic accuracy of magnetic resonance imaging

被引:14
作者
Annabell, Lucas [1 ]
Master, Vahid [2 ]
Rhodes, Alexander [2 ]
Moreira, Brett [1 ]
Coetzee, Cassandra [1 ]
Phong Tran [1 ]
机构
[1] Western Hlth, Dept Orthopaed, 160 Gordon St, Melbourne, Vic 3011, Australia
[2] Western Hlth, Dept Radiol, 160 Gordon St, Melbourne, Vic 3011, Australia
关键词
Hip arthroscopy; Ligamentum teres; MRI; Magnetic resonance imaging; ACETABULAR LABRAL TEARS; MR ARTHROGRAPHY; CARTILAGE LESIONS; LIGAMENTUM TERES; ARTHROSCOPY; EXPERIENCE; PAIN;
D O I
10.1186/s13018-018-0832-z
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
摘要
Background: Hip arthroscopy has led to a greater understanding of intra-articular hip pathology. Non-contrast magnetic resonance imaging (MRI) is currently the gold standard in non-invasive imaging diagnosis, with high sensitivity in identifying labral pathology but equivocal results for ligamentum teres damage and chondral defects. The aim of this study is to determine the accuracy of non-contrast MRI for diagnosis of intra-articular hip derangements and identify radiological features that could increase the accuracy of the diagnosis. Methods: A prospective study of 71 hips on 68 patients undergoing hip arthroscopy was conducted comparing preoperative analysis of MRI imaging versus an arthroscopic examination. Two musculoskeletal radiologists reported the data independently. All hip arthroscopies were performed by a single surgeon. Patients with MRIs performed within 6 months before hip arthroscopy were included. Outcome measures included observer accuracy identifying ligamentum teres tears, labral lesions, and chondral rim damage. Secondary outcome measures included inter-observer variability and correctly staged ligamentum teres tears. Results: The accuracy of radiology reporting for ligamentum teres tears, labral damage, and chondral rim lesions was 85.92% for each instance. The MRI findings most consistent with labral tears include the presence of linear high signal traversing the articular surface into the labrum, presence of intra-labral fluid signal, and loss of homogenous low signal triangular morphology. Chondral rim damage was difficult to diagnose, but abnormal signal at the chondrolabral junction with partial thickness defects would suggest damage. Ligamentum teres tears are commonly found but poorly graded. Thickening and increased signal suggests synovitis while discontinuity and fraying suggests partial tearing. Conclusion: Conventional non-arthrographic MRI offers an accurate non-invasive method to screen patients with symptoms referable to the hip by revealing the presence of labral tears, chondral defects, and ligamentum teres tears/synovitis. This study demonstrates that tears and synovitis of the ligamentum teres as potential sources of hip pain can be accurately identified on conventional non-arthrographic MRI. However, MRI has poor specificity and negative predictive value, and thus, a negative MRI result may warrant further investigation.
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页数:5
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