Normal Labrum and Normal Labral Variants Morphologic Appearance The long head of the biceps tendon attaches both to the superior glenoid and to the superior labrum [13], with approximately 50% of the biceps tendon fibers arising from the superior glenoid labrum and the remainder from the supraglenoid tubercle AJR 2011; 197:596–603 Labrum is predominantly composed of moderately dense bundles of f..
