野球肩にみられる大結節部notchの診断に有用な画像診断

概要

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We reported that greater tuberosity notches seen in shoulders of baseball players frequently accompanied rotator cuff tears. The purpose of this study was to investigate whether greater tuberosity notches could be detected by preoperative imaging. We investigated 45 baseball players who were evaluated as to the presence and size of greater tuberosity notches on shoulder arthroscopy. The presence of greater tuberosity notches on preoperative imaging data using plain X-rays (45-degrees cranio-caudal view), CTs, and MRIs were investigated regarding the relationship with the size of the notches. Statistical significance was evaluated by Fishers exact probability test and Mann-Whitney U analysis. The presence of notches on plain X-rays, CTs, and MRIs correlated with the presence and size of the notches on arthroscopy. Sensitivity, specificity, and accuracy of each imaging data was 82%, 68%, and 75% on plain X-rays, 80%, 83%, and 82% on CTs, 96%, 70%, and 82% on MRIs, respectively. It was possible to detect the presence of greater tuberosity notches on preoperative imaging. While MRI could detect them more easily, they could be detected even with a plain X-ray using 45-degrees cranio-caudal view. Preoperatively, we can expect the presence of rotator cuff tears by detecting the greater tuberosity notches on imaging data.
日本肩関節学会の論文