A. Morphologic Appearance
1. 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
2. Labrum is predominantly composed of moderately dense bundles of fibrous tissue and therefore is quite flexible. This plasticity is considered the most common reason that the tip of a normal labrum can be rounded in shape
Semin Musculoskelet Radiol 2014;18:365–373.
3. The cross-sectional shape of the labrum is triangular in most cases (anterior, 64%; poserior, 47%), followed by rounded (anterior, 17%; posterior, 33%) (14,16). However, in a minority of cases the normal labral shape can be blunted, cleaved, notched, or even flat
The anterior and inferior portions of the labriun are smaller than their posterior and superior counterparts, respectively
Curr Radiol Rep (2017) 5:41
4. Flexible redundant folds at both the anterior and posterior capsular attachments can result in a notched or kinked appearance of the labrum. This notched appearance can also result from the close apposition of the middle and inferior glenohumeral ligaments with the anterior labrum on MR images
Magn Reson Imaging Clin N Am 20 (2012) 213–228
Semin Musculoskelet Radiol 2014;18:365–373.
Curr Radiol Rep (2017) 5:41
Skeletal Radiol (2012) 41:525–530
5. In the presence ofa high attachment anterior band, the anterosuperior labrum is either attenuated (hypoplastic) or absent.
Stoller’s Orthopaedics and Sports Medicine: The Shoulder
Stoller’s Orthopaedics and Sports Medicine: The Shoulder
