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Anteroinferior labrum from the bony glenoid
56%
370/657
Anteroinferior labrum from the cartilaginous surface of the glenoid
32%
211/657
Biceps tendon from its origin on the supraglenoid tubercle
2%
10/657
Anterior capsule from the proximal humerus
7%
48/657
Posteroinferior labrum from the bony glenoid
1%
7/657
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The MRI scan reveals the sequelae of an anteroinferior dislocation, specifically separation of the anteroinferior labrum from the bony glenoid. The separation does not classically occur only at the cartilage-labral junction, but extends to the bony surface of the medial glenoid neck. Separation of the biceps tendon from its origin on the supraglenoid tubercle (SLAP lesion) or separation of the anterior capsule with the proximal humerus (HAGL lesion) may occur but are not the most common sequelae and are not demonstrated in this MRI image. Anteroinferior shoulder dislocations normally do not affect the posterior labral structures. In their landmark study, Rowe and associates noted that this demonstrated lesion was the most common lesion, present in 85% of their series.
2.1
(30)
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