Comparison of MR arthrography with arthroscopy of the hip for the assessment of intra-articular loose bodies |
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Authors: | Andrew C Neckers Joshua M Polster Carl S Winalski Viktor E Krebs M Sundaram |
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Institution: | (1) Columbus Radiology Corporation, 471 E. Broad St., Suite 1500, Columbus, OH 43215, USA;(2) Diagnostic Radiology/A21, The Cleveland Clinic Foundation, Cleveland, OH, USA;(3) Department of Orthopedic Surgery, The Cleveland Clinic Foundation, Cleveland, OH, USA |
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Abstract: | Objective To assess the specificity and sensitivity of MR arthrography of the hip in comparison with arthroscopy for the evaluation
of intra-articular loose bodies.
Design Over a 3-year period, 81 consecutive patients underwent a total of 82 hip arthroscopies by a single orthopedic surgeon for
intractable hip pain. Of the 82 arthroscopies, 70 had pre-operative MR arthrograms. Of these, 57 were available for retrospective
review, after which they were compared with the operative notes of the subsequent arthroscopies.
Results Of 82 arthroscopies 16 (20%) demonstrated intra-articular loose bodies, while, in the study group, nine of 57 had loose bodies
(16%). There was a total of seven discordant cases (five false negatives and two false positives). The sensitivity of MR arthrography
for detection of intra-articular loose bodies was 44%, while the specificity was 96%.
Conclusion While the specificity of MR arthrography for the detection of intra-articular loose bodies was high (96%), the sensitivity
was not nearly as good (44%).
Presented at the Special Scientific Section of the ISS in Vancouver, Canada, September 2006. |
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Keywords: | Hip MR arthrography Joint bodies Sensitivity Specificity |
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