MRI による pulley lesion の診断に関する検討

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  • Diagnostic rate of pulley lesion with MRI

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Background: MRI is the imaging modality of choice for demonstrating pulley lesion. However, there are few reports about diagnosis of pulley lesion by MRI. The purpose of this study was to examine the diagnostic rate of pulley lesion by plain MRI.<BR>Methods: MRIs were obtained on 25 patients who underwent arthroscopy from 2010 to 2012. Several signs that were hypothesized to be helpful in diagnosing pulley lesion were evaluated. Nonvisibility or discontinuity of the SGHL and anterior displacement of the LHB were assessed on parasagittal slice before LHB enter the groove in MRI. In addition, the position of the LHB was assessed on transverse slice. Subluxation of the LHB was defined as displacement over the inner rim of the intertubercular groove with remaining partial contact to the groove. Sensitivities, specificities and accuracies were calculated.<BR>Results: In MRI findings, we diagnosed pulley lesion in 9 shoulders, while in arthroscopic findings, we revealed pulley lesion in 11 shoulders. Sensitivity was 81%, specificity was 85% and accuracy was 85%.<BR>Discussion: Diagnostic rate of pulley lesion with MRI had a high accuracy in this study. To our knowledge, two reports of Weishaupt and Shaeffeler have focused on preoperative diagnostic imaging for pulley lesion. According to their study, MR arthrography provides high accuracy in the evaluation of the pulley lesion. In this study, we obtained the above result by plain MRI. Consequently, preoperative standard MRI findings are helpful for diagnosis of pulley lesion.

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  • 肩関節

    肩関節 37 (3), 971-974, 2013

    日本肩関節学会

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