Objective:To investigate the diagnostic efficacy of magnetic resonance imaging (MRI) for the diagnosis of meniscus tear in different sites and its influencing factors.Methods:The clinical data of 358 patients with unilateral meniscus tear admitted to our hospital from June 2008 to June 2018 were analyzed retrospectively. MRI and arthroscopy were performed. The accuracy of MRI for the diagnosis of meniscus tear in different sites and the influencing factors were analyzed by comparing the results with arthroscopy.Results:The results showed that the accuracy rate was 94.4% for medial anterior horn,94.7% for medial posterior horn,93.9% for medial body,93.4% for medial posterior root,92.5% for lateral anterior horn,96.4% for lateral posterior horn,94.7% for lateral body,92.7% for lateral posterior root,92.2% for Ramp lesions. The rate of missed diagnosis of anterior horn tear by MRI was significantly higher than that of posterior horn and body tears (P<0.05). The χ2 test was used to analyze the accuracy of MRI for the diagnosis of meniscus tear and the potential factors. The results showed that the misdiagnosis and missed diagnosis factors of medial meniscus tear by MRI were age, tearing site, tearing type and tearing length (P<0.05). The misdiagnosis and missed diagnosis factors of lateral meniscus tear by MRI were tearing site, tearing type and tearing length (P<0.05). Conclusion:MRI is the most commonly used noninvasive method indiagnosis of meniscus tear,which shows high diagnostic value. However, it is easily affected to result in misdiagnosis and missed diagnosis by age, tearing site, tearing type and tearing length. |
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