Imaging Review of Subscapularis Tendon and Rotator Interval Pathology

Figure 3

Normal MRI of the right shoulder. Axial T2-weighted fat-suppressed (FS) MRI (a) demonstrates the subscapularis muscle (SSC) traversing along the anterior aspect of the scapula to insert on the lesser tuberosity of the humerus (arrow). The long head of the biceps tendon (arrowhead) is correctly positioned in the bicipital groove at this level. Sagittal oblique T1-weighed MRI (b) provides a view of the rotator interval (ellipse) with visualization of the coracohumeral ligament (arrow). Sagittal oblique T2-weighed FS MRI (c) shows the lateral subscapularis (long arrows), supraspinatus (short arrows), infraspinatus (arrowheads), and teres minor (star) tendons close to their humeral attachment. Coronal T2-weighted FS MRI (d) shows the biceps anchor (arrow head) and the proximal horizontal portion of the long head of the biceps tendon close to its attachment at the glenoid (long arrow). Note. Tendinosis of the supraspinatus attachment is reflected as intratendinous hyperintensity (short arrow).

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