抄録
The purpose of this current study was to investigate the usefulness of MR imaging for diagnosing SLAP lesions. Thirteen painful shoulders were examined. Ten athletes had SLAP lesions, three athletes involved in throwing activities did not have SLAP lesions. Oblique coronal sections of T2*weighted images were obtained using a superconductive MR imager(Shimadzu). The superior labrum was evaluated and classified into 6 types. Type A demonstrated a focal high-intensity on the articular side. Type B showed high-intensity across the whole width of the superior labrum. Type C showed a low area within the high-intensity area. Type D demonstrated a high-intensity band from the glenoid to the biceps tendon, while Type N only showed a low-intensity or partial high-intensity line at the attachment of the superior labrum. Type L showed a high-intensity line along the whole attachment. These MR findings were compared with arthroscopic findings evaluated by Snyder' s classification. One shoulder with type A in MR imaging showed a type III SLAP lesion. Type B showed a type I in one patient and type II in five. Type C showed type II in two. Type D showed type I in one patient. In types N and L, there were no SLAP lesions in two or one patient, respectively. SLAP lesions demonstrated type A, B, C or D on MR imaging, but not type N or L. Type B was the most frequent type of type II SLAP lesion.
