腱板断裂に合併した上方関節唇損傷の MRI 診断

概要

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Background: The purpose of this study was to investigate the efficiency of MR imaging for diagnosing SLAP lesions associated with rotator cuff tear. Methods: 57 shoulders with rotator cuff tear were examined and all patients underwent MRI before arthroscopic rotator cuff repair. Intensity and morphological changes of superior labrum in T2 and PD weighted images by the spin echo method, and multiple echo recombined gradient echo (MERGE) method were evaluated and categorized by Yamasaki's classification. Then we compared the evaluation by MRI with arthroscopic findings. In evaluation by MRI, SLAP lesion was diagnosed with Type II-B, type III or type IV according to Yamazaki's classification. Results: In MERGE method, sensitivity is 100%, specificity is 67% and accuracy is 73%. In T2 weighted images, sensitivity is 45%, specificity is 80% and accuracy is 73%. In PD weighted images, sensitivity is 72%, specificity is 56% and accuracy is 59%. Conclusion: MERGE method had the highest sensitivity and accuracy. So this becomes useful as a screening test of SLAP lesion.