投球障害肩の腱板疎部鏡視所見と病態について

抄録

We think SLAP lesions lead to anterior instability of the shoulder. On the other hand, we have some experiences of insufficiency of SGHL/MGHL without SLAP lesion. So we have investigated arthroscopic findings of the rotator interval in throwing shoulder since 2001 and make a hypothesis of path mechanics between insufficiency of SGHL/MGHL and RI lesion. 78 baseball players were studied. 62.9% (38 of 62) of articular-side-incomplete rotator cuff tears were consolidated with SLAP lesions. 33.3% (8 of 24) of articular-side-incomplete rotator cuff tears without SLAP lesion had tenderness of the lateral side of the coracoid process, inferior sublaxation during internal rotation of the arm, and radiopaque dye pouting into the RI space in arthrogram. They had abnormal findings of SGHL/MGHL. We considered RI lesion as the same as SGHL/MGHL insufficiency. SLAP lesions (anterior type) induce insufficiency of SGHL/MGHL. We concluded that the improvement of SGHL/MGHL function is very important in treating throwing shoulder.