Figure 1. Fibrous Bankart lesion. An axial T1 weighted spin echo MR arthrographic image with fat saturation, at the level of the inferior glenoid labrum, demonstrates the avulsed and displaced labroligamentous complex from the anteroinferior aspect of the glenoid, with complete disruption of the scapular periosteum, which constitutes the fibrous Bankart lesion (arrow).
Figure 2. Bony Bankart lesion. A fracture through the anteroinferior aspect of the bony glenoid rim is well depicted on this axial CT image which together with an avulsed anteroinferior labrum is referred to as an osseous Bankart lesion.
Figure 3. ALPSA lesion. Axial T2* gradient echo MR arthrographic image with fat saturation of an anterior labroligamentous periosteal sleeve avulsion (ALPSA) lesion. The torn anteroinferior labrum remains attached to the scapula via an intact anterior scapular periosteum and can be seen displaced inferomedially, rolled up like a sleeve on the scapular neck (arrow).
Figure 4. Perthes lesion. An axial T1 weighted spin echo MR arthrographic image with fat saturation shows an undisplaced avulsed anteroinferior labrum with medial stripping of an intact scapular periosteum consistent with a Perthes lesion (arrow). This lesion is better visualized when stress is applied such as during abduction and external rotation.
Figure 5. GLAD lesion. A glenolabral articular disruption (GLAD) lesion is well shown on this axial T1 weighted spin echo MR arthrogram with fat saturation. Note the anteroinferior labral tear, with an attached fragment of adjacent articular cartilage, which is held in place by an intact anterior scapular periosteum (arrow).
Figure 6. Type II SLAP lesion. Coronal oblique T2* gradient echo MR arthrographic image with fat saturation illustrates intra-articular contrast interposed between the avulsed superior labral-biceps complex and the glenoid margin, representing a type II superior labral anteroposterior (SLAP) lesion, which is orientated in a lateral direction away from the glenoid rim (arrow).
Figure 7. Paralabral cyst. (a) Ultrasound and (b) coronal T2 weighted MRI showing a cyst in the suprascapular notch (arrows). (c) Fat infiltration of the infraspinatus muscle indicating atrophy is seen on this T1 weighted coronal image.
Figure 8. Normal variant. Sublabral foramen. Intra-articular contrast is visualized extending between the anterosuperior labrum and the glenoid margin, reflecting a normal sublabral foramen (arrow). The extent of the foramen is well depicted on this coronal oblique T1 weighted spin echo MR arthrogram with fat saturation.
Figure 9. Normal variant. Sublabral recess. Intra-articular contrast fills a normal sublabral recess, seen between the glenoid cavity and superior labrum at the 12 o'clock position, on this coronal oblique T1 weighted spin echo MR arthrographic image with fat saturation (arrow). The sublabral recess is smooth and tapering, extending in a medial direction towards the glenoid attachment of the superior labrum. The superior labrum maintains a normal triangular configuration with a sharp free edge and contains no abnormal signal within its substance.
Figure 10. Normal variant. Buford complex. Axial T1 weighted spin echo MR arthrographic image with fat saturation, obtained at the level of the superior half of the glenoid, illustrates a thickened cord-like middle glenohumeral ligament adjacent to the anterosuperior glenoid rim with a congenitally absent labrum (arrow). This combination of findings comprises a normal Buford complex and must not be confused with an avulsed anterior labral fragment.
