Full-thickness supraspinatus tear, HAGL and deficient anteroinferior labrum (MRI arthrogram)
Presentation
Recurrent anterior shoulder dislocations.
Patient Data
Arthrogram
Arthrogram solution decompresses from the glenohumeral joint into the subacromial subdeltoid bursa due to an oblique full-thickness tear of the mid supraspinatus tendon, without tendon retraction.
Arthrogram solution additionally extends along the posterior aspect of the proximal humeral diaphysis, with irregularity and tearing of the humeral insertion of the axillary pouch and the posterior band of the IGHL, in keeping with a HAGL.
Fraying and minor articular sided partial-thickness tears of the anterior infraspinatus overlying a moderate Hill-Sachs defect.
The anteroinferior glenoid labrum is deficient, with the little tissue remaining, retracted and anterior to the anterior glenoid.
No rotator cuff muscle atrophy or fatty replacement.
Case Discussion
Assessing such studies where there is arthrogram solution in the subacromial subdeltoid bursa, one must decide whether this has occurred due to decompression of an appropriately cited glenohumeral injection through a full-thickness rotator cuff tear, or if due to an iatrogenic injection into the bursa. Demonstrated is a full-thickness tear, best identified on the T1-fat saturated sequences.