Presentation
Recurrent shoulder dislocations.
Patient Data
Normal glenohumeral alignment. Large reverse Hill-Sachs defect. No glenoid fracture identified.
Normal glenohumeral alignment; joint space is preserved. Large reverse Hill-Sachs defect with a "hatcheted" appearance suggests recurrent episodes of dislocation. Mild glenoid retroversion. Mild rounding of the posteroinferior glenoid. No glenoid hypoplasia.
Large non-acute reverse Hill-Sachs defect. Rounding of the posteroinferior bony glenoid. Postoinferior labrum is thickened and rounded suggestive of scarring with chondrolabral junction high signal suspicious for a tear. No paralabral cyst.
Case Discussion
Recurrent glenohumeral instability is far more common anteriorly than posteriorly but there are some imaging features in common:
- "hatcheted" appearance of the Hill-Sachs defect
- rounding of the glenoid from repeated impactions
- scarring of the labrum from repeated injuries