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KMID : 1195520110040010001
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Journal of Korean Orthopaedic Ultrasound Society
2011 Volume.4 No. 1 p.1 ~ p.6
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Significance of Ultrasonography in Diagnosis of Medial Meniscus Tear
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Kim Jung-Man
Im Dong-Sun
Kim Tae-Hyung
Kim Jong-Ik
Lee Kyu-Jo
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Abstract
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Purpose: To evaluate the usefulness of ultrasonography in diagnosis of the medial meniscus tear as a screening tool before performing magnetic resonance imaging.
Materials and Methods: From April 2009 to September 2010, magnetic resonance imaging (MRI) was taken in 147 knees out of 341 knees examined with ultrasonography (US) under the suspicion of medial meniscus tear. The sonographic findings were 16 without abnormality, 12 inhomogeneity, 4 cluster, 60 cleavage and 55 more than 5mm medial extrusion of medial meniscus. In Statistical analysis, sensitivity and specificity, positive predictive value and negative predictive values were calculated.
Results: The MRI showed abnormality in 104 knees. Sensitivity and specificity of ultrasonography for MRI was 94.2% and 23.3%, respectively. Positive predictive value was 74.8%, negative predictive value was 62.5%. The positive predictive value of ultrasonography were 58.3% in heterogeneity, 100% in showing cluster, 75% in visible cleft and 80% in medial extrusion.
Conclusion: The US is a useful tool in prediction of medial meniscus tear before confirming it in high-cost MRI.
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KEYWORD
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Knee, Medial meniscus tear, Ultrasound
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